A census is the procedure of systematically acquiring and recording information about the members of a given population. The term is used mostly in connection with national population and housing censuses; other common censuses include agriculture, business, and traffic censuses. The United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practice.[1][2]

The word is of Latin origin: during the Roman Republic, the census was a list that kept track of all adult males fit for military service. The modern census is essential to international comparisons of any kind of statistics, and censuses collect data on many attributes of a population, not just how many people there are. Censuses typically began as the only method of collecting national demographic data, and are now part of a larger system of different surveys. Although population estimates remain an important function of a census, including exactly the geographic distribution of the population, statistics can be produced about combinations of attributes e.g. education by age and sex in different regions. Current administrative data systems allow for other approaches to enumeration with the same level of detail but raise concerns about privacy and the possibility of biasing estimates.[3]

A census can be contrasted with sampling in which information is obtained only from a subset of a population; typically main population estimates are updated by such intercensal estimates. Modern census data are commonly used for research, business marketing, and planning, and as a baseline for designing sample surveys by providing a sampling frame such as an address register. Census counts are necessary to adjust samples to be representative of a population by weighting them as is common in opinion polling. Similarly, stratification requires knowledge of the relative sizes of different population strata which can be derived from census enumerations. In some countries, the census provides the official counts used to apportion the number of elected representatives to regions (sometimes controversially – e.g., Utah v. Evans). In many cases, a carefully chosen random sample can provide more accurate information than attempts to get a population census.[4]

Volkstelling 1925 Census
Census taker visits a Romani family living in a caravan, Netherlands 1925


A census is often construed as the opposite of a sample as its intent is to count everyone in a population rather than a fraction. However, population censuses rely on a sampling frame to count the population. This is the only way to be sure that everyone has been included as otherwise those not responding would not be followed up on and individuals could be missed. The fundamental premise of a census is that the population is not known and a new estimate is to be made by the analysis of primary data. The use of a sampling frame is counterintuitive as it suggests that the population size is already known. However, a census is also used to collect attribute data on the individuals in the nation. This process of sampling marks the difference between historical census, which was a house to house process or the product of an imperial decree, and the modern statistical project. The sampling frame used by census is almost always an address register. Thus it is not known if there is anyone resident or how many people there are in each household. Depending on the mode of enumeration, a form is sent to the householder, an enumerator calls, or administrative records for the dwelling are accessed. As a preliminary to the dispatch of forms, census workers will check any address problems on the ground. While it may seem straightforward to use the postal service file for this purpose, this can be out of date and some dwellings may contain a number of independent households. A particular problem is what are termed 'communal establishments' which category includes student residences, religious orders, homes for the elderly, people in prisons etc. As these are not easily enumerated by a single householder, they are often treated differently and visited by special teams of census workers to ensure they are classified appropriately.

Residence definitions

Individuals are normally counted within households and information is typically collected about the household structure and the housing. For this reason international documents refer to censuses of population and housing. Normally the census response is made by a household, indicating details of individuals resident there. An important aspect of census enumerations is determining which individuals can be counted from which cannot be counted. Broadly, three definitions can be used: de facto residence; de jure residence; and, permanent residence. This is important to consider individuals who have multiple or temporary addresses. Every person should be identified uniquely as resident in one place but where they happen to be on Census Day, their de facto residence, may not be the best place to count them. Where an individual uses services may be more useful and this is at their usual, or de jure, residence. An individual may be represented at a permanent address, perhaps a family home for students or long term migrants. It is necessary to have a precise definition of residence to decide whether visitors to a country should be included in the population count. This is becoming more important as students travel abroad for education for a period of several years. Other groups causing problems of enumeration are new born babies, refugees, people away on holiday, people moving home around census day, and people without a fixed address. People having second homes because of working in another part of the country or retaining a holiday cottage are difficult to fix at a particular address sometimes causing double counting or houses being mistakenly identified as vacant. Another problem is where people use a different address at different times e.g. students living at their place of education in term time but returning to a family home during vacations or children whose parents have separated who effectively have two family homes. Census enumeration has always been based on finding people where they live as there is no systematic alternative - any list you could use to find people is derived from census activities in the first place. Recent UN guidelines provide recommendation on enumerating such complex households.[5]

Enumeration strategies

Historical censuses used crude enumeration assuming absolute accuracy. Modern approaches take into account the problems of overcount and undercount, and the coherence of census enumerations with other official sources of data.[6] This reflects a realist approach to measurement, acknowledging that under any definition of residence there is a true value of the population but this can never be measured with complete accuracy. An important aspect of the census process is to evaluate the quality of the data.[7]

Many countries use a post-enumeration survey to adjust the raw census counts.[8] This works in a similar manner to capture-recapture estimation for animal populations. In census circles this method is called dual system enumeration (DSE). A sample of households are visited by interviewers who record the details of the household as at census day. These data are then matched to census records and the number of people missed can be estimated by considering the number missed in the census or survey but counted in the other. This way counts can be adjusted for non-response varying between different demographic groups. An explanation using a fishing analogy can be found in "Trout, Catfish and Roach..."[9] which won an award from the Royal Statistical Society for excellence in official statistics in 2011.

Enumerator conducting a survey using a mobile phone-based questionnaire in rural Zimbabwe.

Triple system enumeration has been proposed as an improvement as it would allow evaluation of the statistical dependence of pairs of sources. However, as the matching process is the most difficult aspect of census estimation this has never been implemented for a national enumeration. It would also be difficult to identify three different sources that were sufficiently different to make the triple system effort worthwhile. The DSE approach has another weakness in that it assumes there is no person counted twice (over count). In de facto residence definitions this would not be a problem but in de jure definitions individuals risk being recorded on more than one form leading to double counting. A particular problem here are students who often have a term time and family address.

Several countries have used a system which is known as short form/long form.[10] This is a sampling strategy which randomly chooses a proportion of people to send a more detailed questionnaire to (the long form). Everyone receives the short form questions. Thereby more data are collected but not imposing a burden on the whole population. This also reduces the burden on the statistical office. Indeed, in the UK all residents were required to fill in the whole form but only a 10% sample were coded and analysed in detail, until 2001.[11] New technology means that all data are now scanned and processed. Recently there has been controversy in Canada about the cessation of the long form with the head, Munir Sheikh resigning.[12]

The use of alternative enumeration strategies is increasing[13] but these are not so simple as many people assume and only occur in developed countries.[14] The Netherlands has been most advanced in adopting a census using administrative data. This allows a simulated census to be conducted by linking several different administrative databases at an agreed time. Data can be matched and an overall enumeration established accounting for where the different sources are discrepant. A validation survey is still conducted in a similar way to the post enumeration survey employed in a traditional census. Other countries which have a population register use this as a basis for all the census statistics needed by users. This is most common among Nordic countries but requires a large number of different registers to be combined including population, housing, employment and education. These registers are then combined and brought up to the standard of a statistical register by comparing the data in different sources and ensuring the quality is sufficient for official statistics to be produced.[15] A recent innovation is the French instigation of a rolling census programme with different regions enumerated each year such that the whole country is completely enumerated every 5 to 10 years.[16] In Europe, in connection with the 2010 census round, a large number of countries adopted alternative census methodologies, often based on the combination of data from registers, surveys and other sources.[17]


Censuses have evolved in their use of technology with the latest censuses, the 2010 round, using many new types of computing. In Brazil, handheld devices were used by enumerators to locate residences on the ground. In many countries, census returns could be made via the Internet as well as in paper form. DSE is facilitated by computer matching techniques which can be automated, such as propensity score matching. In the UK, all census formats are scanned and stored electronically before being destroyed, replacing the need for physical archives. The record linking to perform an administrative census would not be possible without large databases being stored on computer systems.

New technology is not without problems in its introduction. The US census had intended to use the handheld computers but cost escalated and this was abandoned, with the contract being sold to Brazil. Online response is a good idea but one of the functions of census is to make sure everyone is counted accurately. A system which allowed people to enter their address without verification would be open to abuse. Therefore, households have to be verified on the ground, typically by an enumerator visit or post out. Paper forms are still necessary for those without access to Internet connections. It is also possible that the hidden nature of an administrative census means that users are not engaged with the importance of contributing their data to official statistics.

Alternatively, population estimations may be carried out remotely with GIS and remote sensing technologies.[18]

Census and development

According to UNFPA, "The information generated by a population and housing census – numbers of people, their distribution, their living conditions and other key data – is critical for development." [19] This is because this type of data is essential for policymakers so that they know where to invest. Unfortunately, many countries have outdated or inaccurate data about their populations and therefore, without accurate data are unable to address the needs of their population.

UNFPA stated that,[19]

"The unique advantage of the census is that it represents the entire statistical universe, down to the smallest geographical units, of a country or region. Planners need this information for all kinds of development work, including: assessing demographic trends; analysing socio-economic conditions;[20] designing evidence-based poverty-reduction strategies; monitoring and evaluating the effectiveness of policies; and tracking progress toward national and internationally agreed development goals."

In addition to making policymakers aware about population issues, it is also an important tool for identifying forms of social, demographic or economic exclusions, such as inequalities relating to race, ethics and religion as well as disadvantaged groups such as those with disabilities and the poor.

An accurate census can empower local communities by providing them with the necessary information to participate in local decision-making and ensuring they are represented.

Uses of census data

In the nineteenth century, the first censuses collected paper enumerations that had to be collated by hand so the statistical uses were very basic. The government owned the data and were able to publish statistics themselves on the state of the nation.[21] Uses were to measure changes in the population and apportion representation. Population estimates could be compared to those of other countries.

By the beginning of the twentieth century, censuses were recording households and some indications of their employment. In some countries, census archives are released for public examination after many decades, allowing genealogists to track the ancestry of interested people. Archives provide a substantial historical record which may challenge established notions of tradition. It is also possible to understand the societal history through job titles and arrangements for the destitute and sick.

There are a lot of politics that surround the census in many countries. In Canada in 2010 for example, the government under the leadership of Stephen Harper abolished the mandatory long-form census. The decision to cut the long-form census was a response to protests from some Canadians who resented the personal questions.[22] The long-form census was reinstated by the Justin Trudeau government in 2016.

Census data and research

As governments assumed responsibility for schooling and welfare, large government research departments made extensive use of census data. Actuarial estimates could be made to project populations and plan for provision in local government and regions. It was also possible for central government to allocate funding on the basis of census data. Even into the mid twentieth century, census data was only directly accessible to large government departments. However, computers meant that tabulations could be used directly by university researchers, large businesses and local government offices. They could use the detail of the data to answer new questions and add to local and specialist knowledge.

Now, census data are published in a wide variety of formats to be accessible to business, all levels of governance, media, students and teachers, charities and any citizen who is interested; researchers in particular have an interest in the role of Census Field Officers (CFO) and their assistants.[23] Data can be represented visually or analysed in complex statistical models, to show the difference between certain areas, or to understand the association between different personal characteristics. Census data offer a unique insight into small areas and small demographic groups which sample data would be unable to capture with precision.


Although the census provides a useful way of obtaining statistical information about a population, such information can sometimes lead to abuses, political or otherwise, made possible by the linking of individuals' identities to anonymous census data.[24] This consideration is particularly important when individuals' census responses are made available in microdata form, but even aggregate-level data can result in privacy breaches when dealing with small areas and/or rare subpopulations.

For instance, when reporting data from a large city, it might be appropriate to give the average income for black males aged between 50 and 60. However, doing this for a town that only has two black males in this age group would be a breach of privacy because either of those persons, knowing his own income and the reported average, could determine the other man's income.

Typically, census data are processed to obscure such individual information. Some agencies do this by intentionally introducing small statistical errors to prevent the identification of individuals in marginal populations;[25] others swap variables for similar respondents. Whatever measures have been taken to reduce the privacy risk in census data, new technology in the form of better electronic analysis of data poses increasing challenges to the protection of sensitive individual information. This is known as statistical disclosure control.

Another possibility is to present survey results by means of statistical models in the form of a multivariate distribution mixture.[26] The statistical information in the form of conditional distributions (histograms) can be derived interactively from the estimated mixture model without any further access to the original database. As the final product does not contain any protected microdata, the model based interactive software can be distributed without any confidentiality concerns.

Another method is simply to release no data at all, except very large scale data directly to the central government. Different release strategies between government have led to an international project (IPUMS) to co-ordinate access to microdata and corresponding metadata. Such projects also promote standardising metadata by projects such as SDMX so that best use can be made of the minimal data available.

Historical censuses


Censuses in Egypt first appear in the late Middle Kingdom and develops in the New Kingdom[27] Pharaoh Amasis, according to Herodotus, require every Egyptian to declare annually to the nomarch, "whence he gained his living".[28] Under the Ptolemies and the Romans several censuses were conducted in Egypt by governments officials [29]

Ancient Greece

There are several accounts of ancient Greek city states carrying out censuses.[30]


Censuses are mentioned in the Bible. God commands a per capita tax to be paid with the census in Exodus 30:11-16 for the upkeep of the Tabernacle. The Book of Numbers is named after the counting of the Israelite population (in Numbers 1-4) according to the house of the Fathers after the exodus from Egypt. A second census was taken while the Israelites were camped in the plains of Moab, in Numbers 26.

King David performed a census that produced disastrous results (in 2 Samuel 24 and 1 Chronicles 21). His son, King Solomon, had all of the foreigners in Israel counted in 2 Chronicles 2:17.

When the Romans took over Judea in AD 6, the legate Publius Sulpicius Quirinius organised a census for tax purposes. The Gospel of Luke links the birth of Jesus to this event. Luke 2.


One of the world's earliest preserved censuses[31] was held in China in AD 2 during the Han Dynasty, and is still considered by scholars to be quite accurate.[32][33][34][35] The population was registered as having 57,671,400 individuals in 12,366,470 households.[36] Another census was held in AD 144.


The oldest recorded census in India is thought to have occurred around 300 BC during the reign of The Emperor Chandragupta Maurya under the leadership of Kautilya or Chanakya and Ashoka.[37]


The word "census" originated in ancient Rome from the Latin word censere ("to estimate"). The census played a crucial role in the administration of the Roman Empire, as it was used to determine taxes. With few interruptions, it was usually carried out every five years.[38] It provided a register of citizens and their property from which their duties and privileges could be listed. It is said to have been instituted by the Roman king Servius Tullius in the 6th century BC,[39] at which time the number of arms-bearing citizens was supposedly counted at around 80,000.[40] The 6 AD "census of Quirinius" undertaken following the imposition of direct Roman rule in Judea was partially responsible for the development of the Zealot movement and several failed rebellions against Rome that ended in the Diaspora. The 15-year indiction cycle established by Diocletian in AD 297 was based on quindecennial censuses and formed the basis for dating in late antiquity and under the Byzantine Empire.

Rashidun and Umayyad Caliphates

In the Middle Ages, the Caliphate began conducting regular censuses soon after its formation, beginning with the one ordered by the second Rashidun caliph, Umar.[41]

Medieval Europe

The Domesday Book was undertaken in AD 1086 by William I of England so that he could properly tax the land he had recently conquered in medieval Europe. In 1183, a census was taken of the crusader Kingdom of Jerusalem, to ascertain the number of men and amount of money that could possibly be raised against an invasion by Saladin, sultan of Egypt and Syria.

Inca Empire

In the 15th century, the Inca Empire had a unique way to record census information. The Incas did not have any written language but recorded information collected during censuses and other numeric information as well as non-numeric data on quipus, strings from llama or alpaca hair or cotton cords with numeric and other values encoded by knots in a base-10 positional system.

Spanish Empire

On May 25, 1577, King Philip II of Spain ordered by royal cédula the preparation of a general description of Spain's holdings in the Indies. Instructions and a questionnaire, issued in 1577 by the Office of the Cronista Mayor, were distributed to local officials in the Viceroyalties of New Spain and Peru to direct the gathering of information. The questionnaire, composed of fifty items, was designed to elicit basic information about the nature of the land and the life of its peoples. The replies, known as "relaciones geográficas," were written between 1579 and 1585 and were returned to the Cronista Mayor in Spain by the Council of the Indies.

World population estimates

The earliest estimate of the world population was made by Giovanni Battista Riccioli in 1661; the next by Johann Peter Süssmilch in 1741, revised in 1762; the third by Karl Friedrich Wilhelm Dieterici in 1859.[42]

In 1931, Walter Willcox published a table in his book, International Migrations: Volume II Interpretations, that estimated the 1929 world population to be roughly 1.8 billion.

1929 world population estimate
League of Nations and International Statistical Institute estimates of the world population in 1929

See also


  1. ^ United Nations (2008). Principles and Recommendations for Population and Housing Censuses. Statistical Papers: Series M No. 67/Rev.2. p8. ISBN 978-92-1-161505-0.
  2. ^ "CES 2010 Census Recommendations" (PDF). Unece.org. Retrieved 2013-11-19.
  3. ^ "History and Development of the Census in England and Wales". theforgottenfamily.wordpress.org. Retrieved 2017-01-20.
  4. ^ Salant, Priscilla, and Don A. Dillman. "How to Conduct your own Survey: Leading professional give you proven techniques for getting reliable results." (1995).
  5. ^ "Measurement of emerging forms of families and households". UNECE. Retrieved 2012-12-12.
  6. ^ "Census Quality Evaluation: considerations from an international perspective". Unstats.un.org. Retrieved 2012-02-19.
  7. ^ Breiman, Leo (1994). "The 1991 Census Adjustment: Undercount or Bad Data?". Statistical Science. 9 (4): 458–475.
  8. ^ World Population and Housing Census Programme (2010) Post Enumeration Surveys: Operational guidelines, United Nations Secretariat, Dept of Economic and Social Affairs, Statistics Division, Tech Report
  9. ^ Benton, P. Trout, Catfish and Roach: The beginner’s guide to census population estimates, Office for National Statistics, UK
  10. ^ Other methods of census taking, Office for National Statistics, UK
  11. ^ "Introduction to Census 2001". Ons.gov.uk. 2001-04-29. Retrieved 2012-12-12.
  12. ^ The Canadian Press (2010-07-21). "Text of Munir Sheikh's resignation statement". 680News. Archived from the original on 2011-12-19. Retrieved 2012-02-19.
  13. ^ "[INED] Population and Societies". Ined.fr. Retrieved 2012-02-19.
  14. ^ Kukutai, Tahu (2014). "Whither the census? Continuity and change in census methodologies worldwide, 1985–2014". Journal of Population Research. 32: 3–22. doi:10.1007/s12546-014-9139-z.
  15. ^ "Register-based statistics in the Nordic countries" (PDF). Unece.org. 2007. Retrieved 2012-12-12.
  16. ^ Durr, Jean-Michel and François Clanché. "The French Rolling Census: a decade of experience" (PDF).
  17. ^ "2010 Population Census Round - Confluence". .unece.org. Retrieved 2012-12-12.
  18. ^ Biljecki, F.; Arroyo Ohori, K.; Ledoux, H.; Peters, R.; Stoter, J. (2016). "Population Estimation Using a 3D City Model: A Multi-Scale Country-Wide Study in the Netherlands". PLOS ONE. 11 (6): e0156808. doi:10.1371/journal.pone.0156808. PMC 4890761. PMID 27254151.
  19. ^ a b "Census | UNFPA - United Nations Population Fund". UNFPA.org. Retrieved 2016-07-20.
  20. ^ Corcos, Nick (2017). "Excavations and Watching Brief at the Corner of Wade Street and Little Anne Street, St Jude's, Bristol, 2014". Internet Archaeology (45). doi:10.11141/ia.45.3.
  21. ^ Kathrin Levitan (auth.), A Cultural History of the British Census: Envisioning the Multitude in the Nineteenth Century, 978-1-349-29824-2, 978-0-230-33760-2 Palgrave Macmillan US 2011.
  22. ^ Jennifer Ditchburn (June 29, 2010). "Tories scrap mandatory long-form census". The Globe and Mail. Retrieved September 23, 2017.
  23. ^ Morphy, Frances. "Agency, Contingency and Census Process: Observations of the 2006 Indigenous Enumeration Strategy in Remote Aboriginal Australia". ANU E Press, 2007. Retrieved 19 July 2016. One researcher spent time observing... the training of Census Field Officers (CFO) and their assistants....
  24. ^ "The Census and Privacy". EPIC.org. Retrieved 2016-07-20.
  25. ^ "Managing Confidentiality and Learning about SEIFA". Abs.gov.au. 2006-04-18. Retrieved 2010-11-30.
  26. ^ Grim J, Hora J, Somol P, Boček P, Pudil, P (2010). "Statistical Model of the 2001 Czech Census for Interactive Presentation". Journal of Official Statistics, vol. 26, no. 4. pp. 673–694.
  27. ^ D. Valbelle. "Les recensements dans l'Egypte pharaonique des troisième et deuxième millénaires" CRIPEL 9 (1987) 37 - 49.
  28. ^ Herodotus, Histories II, 177, 2
  29. ^ Paul Cartledge,Peter Garnsey,Erich S. Gruen Hellenistic Constructs: Essays in Culture, History, and Historiography 242 ss.
  30. ^ Missiakoulis, Spyros (2010). "Cecrops, King of Athens: the First (?) Recorded Population Census in History". International Statistical Review. 78 (3): 413–418. doi:10.1111/j.1751-5823.2010.00124.x.
  31. ^ Robert Hymes (2000). John Stewart Bowman, ed. Columbia Chronologies of Asian History and Culture. Columbia University Press. p. 12. ISBN 978-0-231-11004-4.
  32. ^ Jeffrey Hays. "China - Facts and Details: Han Dynasty (206 B.C. - A.D. 220)". Archived from the original on 2010-11-23.
  33. ^ Twitchett, D., Loewe, M., and Fairbank, J.K. Cambridge History of China: The Ch'in and Han Empires 221 B.C.-A.D. 220. Cambridge University Press (1986), p. 240.
  34. ^ Nishijima (1986), 595–596.
  35. ^ Yoon, H. (1985). "An early Chinese idea of a dynamic environmental cycle". GeoJournal. 10 (2): 211–212. doi:10.1007/bf00150742.
  36. ^ Nishijima (1986), pp. 595–596.
  37. ^ "Census Commissioner of India - Historical Background". Govt. of India. The records of census conducted appears from 300 BC.
  38. ^ Scheidel, Walter (2009) Rome and China: comparative perspectives on ancient world empires. Oxford University Press, p. 28.
  39. ^ Livy Ab urbe condita 1.42
  40. ^ Livy Ab urbe condita 1.42, citing Fabius Pictor
  41. ^ al-Qādī1, Wadād (July 2008). "Population Census and Land Surveys under the Umayyads (41–132/661–750)". Der Islam. 83 (2): 341–416. doi:10.1515/ISLAM.2006.015.
  42. ^ Willcox, Walter (1931). "International Migrations, Volume II: Interpretations" (PDF). NBER.
  43. ^ "Africana professor issues call for modernity in Africa". Cornell. 28 May 2015. Retrieved 5 June 2015.


  • Alterman, Hyman, (1969). Counting People: The Census in History. Harcourt, Brace & Company.
  • Behrisch, Lars. (2016) "Statistics and Politics in the 18th Century." Historical Social Research/Historische Sozialforschung (2016): 238-257.
  • Bielenstein, Hans, (1978). "Wang Mang, the restoration of the Han dynasty, and Later Han." In The Cambridge History of China, vol. 1, eds. Denis Twitchett and John K. Fairbank, p. 223-90, Cambridge: Cambridge University Press.
  • Krüger, Stephen, (Fall 1991). "The Decennial Census", 19 Western State University Law Review 1; available at HeinOnline (subscription required).
  • Effects of UK 'Jedi' hoax on 2001 UK census from ONS.
  • U.S. Census Press Release on 1930 Census.
  • U.S. Census Press Release on Soundex and WPA.
  • Nishijima, Sadao (1986), "The economic and social history of Former Han", in Twitchett, Denis; Loewe, Michael, Cambridge History of China: Volume I: the Ch'in and Han Empires, 221 B.C. – A.D. 220, Cambridge: Cambridge University Press, pp. 545–607, ISBN 978-0-521-24327-8.

External links

1910 United States Census

The Thirteenth United States Census, conducted by the Census Bureau on April 15, 1910, determined the resident population of the United States to be 92,228,496, an increase of 21.0 percent over the 76,212,168 persons enumerated during the 1900 Census. The 1910 Census switched from a portrait page orientation to a landscape orientation.

1950 United States Census

The Seventeenth United States Census, conducted by the Census Bureau, determined the resident population of the United States to be 150,697,361, an increase of 14.5 percent over the 131,669,275 persons enumerated during the 1940 Census. This was the first census in which:

More than one state recorded a population of over 10 million

Every state and territory recorded a population of over 100,000

All 100 largest cities recorded populations of over 100,000

2000 United States Census

The Twenty-second United States Census, known as Census 2000 and conducted by the Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2% over the 248,709,873 people enumerated during the 1990 Census. This was the twenty-second federal census and was at the time the largest civilly administered peacetime effort in the United States.Approximately 16 percent of households received a "long form" of the 2000 census, which contained over 100 questions. Full documentation on the 2000 census, including census forms and a procedural history, is available from the Integrated Public Use Microdata Series.

This was the first census in which a state – California – recorded a population of over 30 million, as well as the first in which two states – California and Texas – recorded a population of more than 20 million.

2010 United States Census

The 2010 United States Census (commonly referred to as the 2010 Census) is the twenty-third and most recent United States national census. National Census Day, the reference day used for the census, was April 1, 2010. The census was taken via mail-in citizen self-reporting, with enumerators serving to spot-check randomly selected neighborhoods and communities. As part of a drive to increase the count's accuracy, 635,000 temporary enumerators were hired. The population of the United States was counted as 308,745,538, a 9.7% increase from the 2000 Census. This was the first census in which all states recorded a population of over half a million, as well as the first in which all 100 largest cities recorded populations of over 200,000.

2011 Census of India

The 15th Indian Census was conducted in two phases, house listing and population enumeration. House listing phase began on 1 April 2010 and involved collection of information about all buildings. Information for National Population Register was also collected in the first phase, which will be used to issue a 12-digit unique identification number to all registered Indian residents by Unique Identification Authority of India (UIDAI). The second population enumeration phase was conducted between 9 and 28 February 2011. Census has been conducted in India since 1872 and 2011 marks the first time biometric information was collected. According to the provisional reports released on 31 March 2011, the Indian population increased to 1.21 billion with a decadal growth of 17.70%. Adult literacy rate increased to 74.04% with a decadal growth of 9.21%. The motto of the census was 'Our Census, Our future'.

Spread across 29 states and 7 union territories, the census covered 640 districts, 5,924 sub-districts, 7,935 towns and more than 600,000 villages. A total of 2.7 million officials visited households in 7,935 towns and 600,000 villages, classifying the population according to gender, religion, education and occupation. The cost of the exercise was approximately ₹2,200 crore (US$310 million) – this comes to less than $0.50 per person, well below the estimated world average of $4.60 per person. Conducted every 10 years, this census faced big challenges considering India's vast area and diversity of cultures and opposition from the manpower involved.

Information on castes was included in the census following demands from several ruling coalition leaders including Lalu Prasad Yadav, Sharad Yadav and Mulayam Singh Yadav supported by opposition parties Bharatiya Janata Party, Akali Dal, Shiv Sena and Anna Dravida Munnetra Kazhagam. Information on caste was last collected during the British Raj in 1931. During the early census, people often exaggerated their caste status to garner social status and it is expected that people downgrade it now in the expectation of gaining government benefits. There was speculation that there would be a caste-based census conducted in 2011, the first time for 80 years (last was in 1931), to find the exact population of the "Other Backward Classes" (OBCs) in India. This was later accepted and the Socio Economic and Caste Census 2011 was conducted whose first findings were revealed on 3 July 2015 by Union Finance Minister Arun Jaitley. Mandal Commission report of 1980 quoted OBC population at 52%, though National Sample Survey Organisation (NSSO) survey of 2006 quoted OBC population at 41%There is only one instance of a caste-count in post-independence India. It was conducted in Kerala in 1968 by the Communist government under E M S Namboodiripad to assess the social and economic backwardness of various lower castes. The census was termed Socio-Economic Survey of 1968 and the results were published in the Gazetteer of Kerala, 1971.


Americans are nationals and citizens of the United States of America. Although nationals and citizens make up the majority of Americans, some dual citizens, expatriates, and permanent residents, may also claim American nationality. The United States is home to people of many different ethnic origins. As a result, American culture and law does not equate nationality with race or ethnicity, but with citizenship and permanent allegiance.English-speakers, and even speakers of many other languages, typically use the term "American" to exclusively mean people of the United States; this developed from its original use to differentiate English people of the American colonies from English people of England. The word "American" can also refer to people from the Americas in general (see names for United States citizens).

Census-designated place

A census-designated place (CDP) is a concentration of population defined by the United States Census Bureau for statistical purposes only. CDPs have been used in each decennial census since 1980 as the counterparts of incorporated places, such as self-governing cities, towns, and villages, for the purposes of gathering and correlating statistical data. CDPs are populated areas that generally include one officially designated but currently unincorporated small community, for which the CDP is named, plus surrounding inhabited countryside of varying dimensions and, occasionally, other, smaller unincorporated communities as well. CDPs include small rural communities, colonias located along the U.S. border with Mexico, and unincorporated resort and retirement communities and their environs.The boundaries of a CDP have no legal status. Thus, they may not always correspond with the local understanding of the area or community with the same name. However, criteria established for the 2010 Census require that a CDP name "be one that is recognized and used in daily communication by the residents of the community" (not "a name developed solely for planning or other purposes") and recommend that a CDP's boundaries be mapped based on the geographic extent associated with inhabitants' regular use of the named place.The Census Bureau states that census-designated places are not considered incorporated places and that it includes only census-designated places in its city population list for Hawaii because that state has no incorporated cities. In addition, census city lists from 2007 included Arlington County, Virginia's CDP in the list with the incorporated places, but since 2010, only the Urban Honolulu CDP, Hawaii representing the historic core of Honolulu, Hawaii, is shown in the city and town estimates.

Census in Australia

The census in Australia, or officially, the Census of Population and Housing, collects key characteristic data on every person in Australia, and the place they are staying in, on a particular night. The census is the largest statistical collection compiled by the Australian Bureau of Statistics and is held every five years. Participation in the census is compulsory, although answering some questions (such as religion) is optional. The Australian Bureau of Statistics is legislated to collect, hold and disseminate census data under the Australian Bureau of Statistics Act 1975 (ABS Act), and the Census and Statistics Act 1905 (Census and Statistics Act).The first Australian census was held in 1911, on the night of 2 April (previous censuses being organised by the colonies) and subsequent censuses were held in 1921, 1933, 1947, 1954 and 1961. In 1961 the five-year period was introduced. Censuses are held on the second Tuesday of August. The most recent was held on 9 August 2016 at a cost of $440 million.The census counts all people who are located within Australia and its external and internal territories, with the exception of foreign diplomats and their families, on census night. For the first time, in 2016 Norfolk Island was included in the Australian census rather than being conducted by the Norfolk Island Government. The census examines data such as age, gender, incomes, occupations, dwelling types and occupancy, transportation modes, ancestry, languages spoken, and religion.

Demographics of India

India is the second most populated country in the world with nearly a fifth of the world's population. According to the 2017 revision of the World Population Prospects, the population stood at 1,324,171,354.

During 1975–2010 the population doubled to 1.2 billion. The Indian population reached the billion mark in 1998. India is projected to be the world's most populous country by 2024, surpassing the population of China. It is expected to become the first political entity in history to be home to more than 1.5 billion people by 2030, and its population is set to reach 1.7 billion by 2050. Its population growth rate is 1.13%, ranking 112th in the world in 2017.India has more than 50% of its population below the age of 25 and more than 65% below the age of 35. It is expected that, in 2020, the average age of an Indian will be 29 years, compared to 37 for China and 48 for Japan; and, by 2030, India's dependency ratio should be just over 0.4.India has more than two thousand ethnic groups, and every major religion is represented, as are four major families of languages (Indo-European, Dravidian, Austroasiatic and Sino-Tibetan languages) as well as two language isolates (the Nihali language spoken in parts of Maharashtra and the Burushaski language spoken in parts of Jammu and Kashmir (Kashmir).

Further complexity is lent by the great variation that occurs across this population on social parameters such as income and education. Only the continent of Africa exceeds the linguistic, genetic and cultural diversity of the nation of India.The sex ratio is 944 females for 1000 males (2016) (940 per 1000 in 2011) This ratio has been showing an upwards trend for the last two decades after a continuous decline in the last century.

Lee County, Alabama

Lee County is a county located in the east central portion of the U.S. state of Alabama. As of the 2010 census the population was 140,247. The county seat is Opelika, and the largest city is Auburn. The county is named for General Robert E. Lee (1807–1870), who served as General in Chief of the Armies of the Confederate States in 1865. Lee County comprises the Auburn-Opelika, AL Metropolitan Statistical Area, which is included in the Columbus-Auburn-Opelika, GA-AL Combined Statistical Area.

List of United States congressional districts

Congressional districts in the United States are electoral divisions for the purpose of electing members of the United States House of Representatives. The number of voting seats in the House of Representatives is currently set at 435 with each one representing approximately 711,000 people. That number has applied since 1913, excluding a temporary increase to 437 after the admissions of Alaska and Hawaii. The total number of state members is capped by the Reapportionment Act of 1929. In addition, each of the five inhabited U.S. territories and the federal district of Washington, D.C. sends a non-voting delegate to the House of Representatives.

The Bureau of the Census conducts a constitutionally mandated decennial census whose figures are used to determine the number of congressional districts to which each state is entitled, in a process called "apportionment". The 2012 elections were the first to be based on the congressional districts which were defined based on the 2010 United States Census.Each state is responsible for the redistricting of districts within their state, and several states have one "at-large" division. Redistricting must take place if the number of members changes following a reapportionment, or may take place at any other time if demographics represented in a district has changed substantially. Districts may sometimes retain the same boundaries while changing their district numbers.

The following is a complete list of the 435 current congressional districts for the House of Representatives, and over 200 obsolete districts, and the six current and one obsolete non-voting delegations.

List of cities in India by population

The following tables are the list of cities in India by population. Often cities are bifurcated into multiple regions (municipalities) which results in creation of cities within cities which may figure in the list. The entire work of this article is based on Census of India, 2011, conducted by the Office of the Registrar General and Census Commissioner, under Ministry of Home Affairs (India), Government of India.

List of regions of the United States

This is a list of some of the regions in the United States. Many regions are defined in law or regulations by the federal government.

Northeastern United States

The Northeastern United States, also referred to as simply the Northeast, is a geographical region of the United States bordered to the north by Canada, to the east by the Atlantic Ocean, to the south by the Southern United States, and to the west by the Midwestern United States. The Northeast is one of the four regions defined by the United States Census Bureau for the collection and analysis of statistics.The Census Bureau-defined region has a total area of 181,324 sq mi (469,630 km2) with 162,257 sq mi (420,240 km2) of that being land mass. Although it lacks a unified cultural identity, the Northeastern region is the nation's most economically developed, densely populated, and culturally diverse region. Of the nation's four census regions, the Northeast is the second most urban, with 85 percent of its population residing in urban areas, led by the West with 90 percent.

Race and ethnicity in the United States

Race and ethnicity in the United States is a complex topic both because the United States has a racially and ethnically diverse population and because the country has a heavily racist past involving slavery and anti-miscegenation laws. At the federal level, race and ethnicity have been categorized separately.

The most recent United States Census officially recognized five racial categories (White American, Black or African American, Native American and Alaska Native, Asian American, and Native Hawaiian and Other Pacific Islander) as well as people of two or more races. The Census Bureau also classified respondents as "Hispanic or Latino" or "Not Hispanic or Latino", identifying Hispanic and Latino as an ethnicity (not a race), which comprises the largest minority group in the nation. The United States Supreme Court unanimously held that "race" is not limited to Census designations on the "race question" but extends to all ethnicities, and thus can include Jewish (which has the unique status as both an ethnicity and a religion), Arab, Hungarian, Laotian, Zulu, etc. The Census also asked an "Ancestry Question," which covers the broader notion of ethnicity, in the 2000 Census long form and the American Community Survey; the question will return in the 2020 Census.As of July 2016, White Americans are the racial majority. African Americans are the largest racial minority, comprising an estimated 12.7% of the population. Hispanic and Latino Americans are the largest ethnic minority, comprising an estimated 17.8% of the population. The White, non-Hispanic or Latino population make up 61.3% of the nation's total, with the total White population (including White Hispanics and Latinos) being 76.9%.White Americans are the majority in every census-defined region (Northeast, Midwest, South, West) and in every state except Hawaii, but contribute the highest proportion of the population in the Midwestern United States, at 85% per the Population Estimates Program (PEP) or 83% per the American Community Survey (ACS). Non-Hispanic Whites make up 79% of the Midwest's population, the highest ratio of any region. However, 35% of White Americans (whether all White Americans or non-Hispanic/Latino only) live in the South, the most of any region.Currently, 55% of the African American population lives in the South. A plurality or majority of the other official groups reside in the West. The latter region is home to 42% of Hispanic and Latino Americans, 46% of Asian Americans, 48% of American Indians and Alaska Natives, 68% of Native Hawaiians and Other Pacific Islanders, 37% of the "two or more races" population (Multiracial Americans), and 46% of those self-designated as "some other race".

Race and ethnicity in the United States Census

Race and ethnicity in the United States Census, defined by the federal Office of Management and Budget (OMB) and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are of Hispanic or Latino origin (the only categories for ethnicity).The racial categories represent a social-political construct for the race or races that respondents consider themselves to be and, "generally reflect a social definition of race recognized in this country." OMB defines the concept of race as outlined for the US Census as not "scientific or anthropological" and takes into account "social and cultural characteristics as well as ancestry", using "appropriate scientific methodologies" that are not "primarily biological or genetic in reference." The race categories include both racial and national-origin groups.Race and ethnicity are considered separate and distinct identities, with Hispanic or Latino origin asked as a separate question. Thus, in addition to their race or races, all respondents are categorized by membership in one of two ethnic categories, which are "Hispanic or Latino" and "Not Hispanic or Latino". However, the practice of separating "race" and "ethnicity" as different categories has been criticized both by the American Anthropological Association and members of US Commission on Civil Rights.In 1997, OMB issued a Federal Register notice regarding revisions to the standards for the classification of federal data on race and ethnicity. OMB developed race and ethnic standards in order to provide "consistent data on race and ethnicity throughout the Federal Government. The development of the data standards stem in large measure from new responsibilities to enforce civil rights laws." Among the changes, OMB issued the instruction to "mark one or more races" after noting evidence of increasing numbers of interracial children and wanting to capture the diversity in a measurable way and having received requests by people who wanted to be able to acknowledge their or their children's full ancestry rather than identifying with only one group. Prior to this decision, the Census and other government data collections asked people to report only one race.

United States Census

The United States Census is a decennial census mandated by Article I, Section 2 of the United States Constitution, which states: "Representatives and direct Taxes shall be apportioned among the several States ... according to their respective Numbers ... . The actual Enumeration shall be made within three Years after the first meeting of the Congress of the United States, and within every subsequent Term of ten Years." Section 2 of the 14th Amendment states: "Representatives shall be apportioned among the several States according to their respective numbers, counting the whole number of persons in each State, excluding Indians not taxed." The United States Census Bureau (officially the Bureau of the Census, as defined in Title 13 U.S.C. § 11) is responsible for the United States Census. The Bureau of the Census is part of the United States Department of Commerce.The first census after the American Revolution was taken in 1790, under Secretary of State Thomas Jefferson; there have been 22 federal censuses since that time. The current national census was held in 2010; the next census is scheduled for 2020 and will be largely conducted using the Internet. For years between the decennial censuses, the Census Bureau issues estimates made using surveys and statistical models, in particular, the American Community Survey.

Title 13 of the United States Code governs how the Census is conducted and how its data is handled. Information is confidential as per 13 U.S.C. § 9. Refusing or neglecting to answer the census is punishable by fines of $100, for a property or business agent to fail to provide correct names for the census is punishable by fines of $500, and for a business agent to provide false answers for the census is punishable by fines of $10,000, pursuant to 13 U.S.C. § 221-224.

The United States Census is a population census, which is distinct from the U.S. Census of Agriculture, which is no longer the responsibility of the Census Bureau. It is also distinct from local censuses conducted by some states or local jurisdictions.

United States Census Bureau

The United States Census Bureau (USCB; officially the Bureau of the Census, as defined in Title 13 U.S.C. § 11) is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy. The Census Bureau is part of the U.S. Department of Commerce and its director is appointed by the President of the United States.

The Census Bureau's primary mission is conducting the U.S. Census every ten years, which allocates the seats of the U.S. House of Representatives to the states based on their population. The Bureau's various censuses and surveys help allocate over $400 billion in federal funds every year and it helps states, local communities, and businesses make informed decisions. The information provided by the census informs decisions on where to build and maintain schools, hospitals, transportation infrastructure, and police and fire departments.In addition to the decennial census, the Census Bureau continually conducts dozens of other censuses and surveys, including the American Community Survey, the U.S. Economic Census, and the Current Population Survey. Furthermore, economic and foreign trade indicators released by the federal government typically contain data produced by the Census Bureau.

White Americans

White Americans are Americans who are descendants from any of the white racial groups of Europe, the Middle East and North Africa or in census statistics, those who self-report as white based on having majority-white ancestry. White Americans (including White Hispanics) constitute the historical and current majority of the people living in the United States, with 72% of the population in the 2010 United States Census. Non-Hispanic whites totaled about 197,285,202 or 60.7% of the U.S. population. European Americans are the largest ethnic group of White Americans and constitute the historical population of the United States since the nation's founding.

The United States Census Bureau defines white people as those "having origins in any of the original peoples of Europe, the Middle East or North Africa." Like all official U.S. racial categories, "White" has a "not Hispanic or Latino" and a "Hispanic or Latino" component, the latter consisting mostly of White Mexican Americans and White Cuban Americans. The term "Caucasian" is synonymous with "white", although the latter is sometimes used to denote skin tone instead of race. Some of the non-European ethnic groups classified as white by the U.S. Census, such as Arab Americans, Jewish Americans, and Hispanics or Latinos, may not identify as or may not be perceived to be, white.

The largest ancestries of American whites are: German Americans (17%), Irish Americans (12%), English Americans (9%), Italian Americans (6%), French Americans (4%), Polish Americans (3%), Scottish Americans (3%), Scotch-Irish Americans (2%), Dutch Americans (2%), Norwegian Americans (2%) and Swedish Americans (1%). However, the English Americans and British Americans demography is considered a serious under-count as the stock tend to self-report and identify as simply "Americans" (7%), due to the length of time they have inhabited the United States, particularly if their family arrived prior to the American Revolution. The vast majority of white Americans also have ancestry from multiple countries.

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