Tuva (; Russian: Тува́) or Tyva (Tuvan: Тыва, romanized: Tıva), officially the Republic of Tuva, is a republic of Russia. Tuva lies at the geographical center of Asia, in southern Siberia. The republic borders the Altai Republic, Khakassia, Krasnoyarsk Krai, Irkutsk Oblast, and Buryatia in Russia, and shares an international border with Mongolia to the south. Tuva has a population of 336,651 (2021 census). Its capital is the city of Kyzyl.

Historically part of Outer Mongolia as Tannu Uriankhai during the Qing dynasty, the last imperial dynasty of China, Tuva broke away in 1911 as the Uryankhay Republic following the Xinhai Revolution, which created the Republic of China. It became a Russian protectorate in 1914 and was replaced by the nominally independent Tuvan People's Republic in 1921 (known officially as Tannu Tuva until 1926), recognized only by its neighbors the Soviet Union and Mongolia, before being annexed into the former in 1944. A majority of the population are ethnic Tuvans who speak Tuvan as their native tongue, while Russian is spoken natively by the Russian minority; both are official and widely understood in the republic. The Great Khural is the regional parliament of Tuva.