Two ships have been named Sibir and one has been laid with planned same name:
Sibir (1937 icebreaker), a Soviet icebreaker launched in 1937 as I. Stalin, later renamed. She was broken up in 1973.
Sibir (1977 icebreaker) (1977–1992), a Soviet Arktika-class nuclear icebreaker.
Sibir (laid icebreaker), a Russian nuclear ship from the LC-60YA-class icebreakers (Project 22220 nuclear-powered icebreaker), laid down in 2015 and expected to enter service in 2019.