Krasnoyarsk (/ˌkræsnəˈjɑːrsk, ˌkrɑːs-/ KRA(H)SS-nə-YARSK; Russian: Красноя́рск, tr. Krasnojársk, IPA: ) is the largest city and administrative center of Krasnoyarsk Krai, Russia, located on the river Yenisey. It is the third-largest city in Siberia after Novosibirsk and Omsk, with a population of 1,035,528 as of the 2010 Census. Krasnoyarsk is an important junction of the Trans-Siberian Railway and one of Russia's largest producers of aluminum.

The city is known for its natural landscapes; author Anton Chekhov judged Krasnoyarsk to be the most beautiful city in Siberia.[18] The Stolby Nature Sanctuary is located 10 km south of the city. Krasnoyarsk is a major educational center in Siberia and hosts the Siberian Federal University.

In 2019, Krasnoyarsk was the host city of the 2019 Winter Universiade, the third hosted in Russia.