Diocaesarea or Diocaesareia or Diokaisareia (Ancient Greek: Διοκαισάρεια) was a Graeco-Roman town located in Cilicia Trachea mentioned by Ptolemy and the ecclesiastical authorities. It was in time assigned to the late Roman province of Isauria. It was a bishopric; no longer the seat a residential bishop, it remains a titular see of the Roman Catholic Church.
Diocaesarea is a historic name for the town of Sepphoris in Israel.
Diocaesarea or Diocæsarea or Diocaesareia or Diokaisareia (Ancient Greek: Διοκαισάρεια) may also refer to:
Diocaesarea (Cappadocia), a town of ancient Cappadocia
Diocaesarea (Isauria), a town of ancient Cilicia Trachea, and later Isauria
Diocaesarea a historic name of Anazarbus, now in Turkey
Diocaesarea a historic name of Ceretapa, now in Turkey