At 90 kilometers (56 mi) long by 24 kilometers (15 mi) wide, it is the largest and westernmost of the Commander Islands, with an area of 1,660 square kilometers (640 sq mi). Most of Bering island and several of the smaller islands in their entirety are now part of the Komandorsky Zapovednik nature preserve.
Known as the "hidden Jewel of the U.S.-Russia Maritime Boundary," Bering Island is treeless, desolate and experiences severe weather, including high winds, persistent fog and earthquakes. It had no year-round human residents until roughly 1826. Now, the village of Nikolskoye is home to 800 people, roughly three hundred of them identifying as Aleuts. The island's scant population is involved mostly in fishing.
4 km off Bering Island's northwest shore lies small Toporkov Island (Ostrov Toporkov)  It is a round island with a diameter of 800 m..
In 1741 Commander Vitus Bering, sailing in Svyatoy Pyotr (St. Peter) for the Russian Navy, was shipwrecked and died of scurvy on Bering Island, along with 28 of his men. His ship had been destroyed by storms as they returned from an expedition that discovered mainland Alaska as well as the Aleutian Islands. The survivors under the command of the Swedish born lieutenant Sven Waxell were stranded on the island for 10 months, and managed to survive by killing seals and birds. They were able to build a boat out of their stranded wreck and managed to return to Petropavlovsk on the Kamchatka Peninsula in 1742 with sea otter furs and preserved meat from the newly discovered island.
Another of the expedition's survivors was Georg Wilhelm Steller, who eventually managed to convince his companions to eat seaweed (thus curing their scurvy). Steller explored Bering island and cataloged its fauna, including Steller's sea cow, which became extinct within three decades due to being hunted for its meat. The island's highest point (2,464 feet (751 m)) is now named to honor the German-born naturalist. Upon returning to the Russian mainland, Steller then explored the Kamchatka peninsula and ultimately published De Bestiis Marinis (‘On the Beasts of the Sea’). However, his sympathies for the native peoples led to accusations that he was fomenting rebellion, so he was imprisoned and recalled to St. Petersburg, dying en route at age 37, although his diaries were later published to great acclaim and historic significance.
In 1743 Emilian Basov landed on Bering island to hunt sea otter, beginning the island's documented human habitation as well as ecological destruction. Promyshlenniki began to island-hop across the Bering Sea to the Aleutian islands and ultimately Alaska. In 1825 the Russian-American Company transferred Aleut families from Attu Island to Bering island to hunt, and another group of Aleut and mixed-race settlers followed the following year, thus establishing the first known permanent human habitation on Bering island. After Russia sold Alaska and the Aleutian islands to the United States in 1867, Bering island was placed under the Petropavlovsk-Kamchatsky jurisdiction. The population grew from 110 people in 1827 (17 Russians, 45 Aleuts and 48 mixed race) to more than 300 people in 1879 (100 Aleuts on Copper island alone, along with 332 mixed-race and about 10% Russian or other nationalities). In 1990, after 170 years of separation and loss of cultural traditions, a planeload of Aleuts from Nikolskoye met another planeload of Alaskan Aleuts in Kamchatka's capital, and were surprised they could still communicate in the old Aleut language. Because of their isolation, like the now-Alaskan Pribilof Islands, the Aleuts have been used for studies of genetic drift.
The area surrounding Bering Island is now a biosphere reserve, known for its diverse wildlife, and particularly marine mammals. The island's shores form a natural habitat for sea otters, and their population now appears stable, unlike on other Aleutian islands, and although they had been hunted to near extinction on the then-recently discovered Bering island by 1854. Steller sea lions continue to summer on Bering island, but the manatee-like Steller's sea cows, which fed on the kelp beds surrounding the island, were hunted to extinction by 1768.
Bering island has also long been famous for its seal rookeries, including northern fur seals, common seals and larga seals, although that population dropped to but 2 rookeries totaling 3,000 seals by 1913 (two years after the North Pacific Fur Seal Convention of 1911), particularly after the 20 year hunting lease of Hutchinson, Kohl and Company of San Francisco, which removed over 800,000 pelts.
Bering island also has numerous seabirds. UNESCO noted that 203 bird species have been sighted on the Commander Islands, including 58 nesting there. Puffins are abundant, although the flightless spectacled cormorant became extinct circa 1850. Two species of the Arctic foxes that tormented Bering's crew remain. Humans introduced reindeer, American mink and rats to the islands, with negative effects on native wildlife.