Chukotka Autonomous Okrug (Russian: Чуко́тский автоно́мный о́круг, tr. Chukotsky avtonomny okrug; IPA: [tɕʊˈkotskʲɪj ɐftɐˈnomnɨj ˈokrʊk]; Chukchi: Чукоткакэн автономныкэн округ, Chukotkaken avtonomnyken okrug, IPA: [tɕukotˈkaken aβtonomˈnəken ˈokɹuɣ]) or Chukotka (Чуко́тка) is a federal subject of Russia (an autonomous okrug) located in the Russian Far East. The population was recorded at 50,526 in the 2010 Census.

The autonomous okrug's surface area is 737,700 square kilometers (284,800 sq mi). The principal town and the administrative center is Anadyr. The region is the most northeasterly region of Russia and, since the sale of Alaska to the United States, has been the only part of Russia lying partially in the Western Hemisphere (east of the 180th meridian).

Elgygytgyn Lake, an impact crater lake, is located in Chukotka, as is the village of Uelen, the closest substantial Russian settlement to the United States.

Chukotka is bordered in the north by the Chukchi Sea and the East Siberian Sea, which are part of the Arctic Ocean; in the east by the Bering Strait and the Bering Sea, part of the Pacific Ocean; in the south by Kamchatka Krai and Magadan Oblast; and in the west by the Sakha Republic. The Chukchi Peninsula projects eastward forming the Bering Strait between Russia and Alaska, and encloses the north side of the Gulf of Anadyr. The peninsula's easternmost point, Cape Dezhnev, is also the easternmost point of mainland Russia.

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