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 (an autonomous okrug) of Russia. It is geographically located in the Far East region of the country, and is administratively part of the Far Eastern Federal District. Chukotka is the 2nd-least-populated federal subject at 50,526 (2010) and the least densely populated.

Anadyr is the largest town and the capital of Chukotka, and the easternmost settlement to have town status in Russia.

Chukotka is home to Elgygytgyn Lake, an impact crater lake, and the village of Uelen, the easternmost settlement in Russia and the closest substantial settlement to the United States. The autonomous okrug's surface area is 737,700 square kilometers (284,800 sq mi), about 6% larger than the U.S. state of Texas, and is the 7th-largest Russian federal subject. The region is the most northeasterly region of Russia, and since the Alaska Purchase has been the only part of Russia lying partially in the Western Hemisphere (east of the 180th meridian). Chukotka shares a border with the Sakha Republic to the west, Magadan Oblast to the south-west, and Kamchatka Krai to the south.

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