The Sakha (Yakutia) Republic (Sakha: Саха Өрөспүүбүлүкэтэ, translit. Sakha Öröspüübülükete, IPA: [saˈxa øɾøsˈpyːbylykete]; Russian: Республика Саха (Якутия), tr. Respublika Sakha (Yakutiya), IPA: [rʲɪsˈpublʲɪkə sɐˈxa jɪˈkutʲɪjə]), simply Sakha (Yakutia) (Sakha: Саха Сирэ, translit. Sakha Sire; Russian: Саха (Якутия)), is a federal subject of Russia (a republic). It has a population of 958,528 (2010 Census), consisting mainly of ethnic Yakuts and Russians.

Comprising half of the Far Eastern Federal District, it is the largest subnational governing body by area in the world at 3,083,523 square kilometers (1,190,555 sq mi) and the eighth largest territory in the world, if the federal subjects of Russia were compared with other countries. It is larger than Argentina and just smaller than India which covers an area of 3,287,590 square kilometers (1,269,350 sq mi). Its capital is the city of Yakutsk. The Sakha Republic is one of the ten autonomous Turkic Republics within the Russian Federation. It is also well known for its extreme and severe climate, with the lowest temperatures in the Northern Hemisphere being recorded in Verkhoyansk and Oymyakon, and regular winter averages commonly being below −35 °C (−31 °F) in several population centres, including Yakutsk. The hypercontinental tendencies also result in very warm summers for much of the republic.

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