Olexandr Olexandrovych Kolchenko (Ukrainian: ????????? ????????????? ?????????, Russian: ????????? ????????????? ?????????, nicknamed "Tundra", born November 26, 1989) is a Ukrainian left-wing and trade union activist, antifascist, anarchist, ecologist, archaeologist, who has been convicted of terrorism by the Russian administration of Crimea in 2014.
Olexandr Kolchenko and three more Crimean pro-Ukrainian activists: Olexiy Chyrniy, Gennadiy Afanasyev and Oleg Sentsov are united by a common criminal case of the so-called "Crimean terrorists".
All four have been arrested and imprisoned in Russia after the annexation of Crimea by the Russian Federation.
On 7 September 2019 Kolchenko was released in a prisoner swap.