The Tarbagan marmot (Marmota sibirica ) is a species of rodent in the family Sciuridae. It is found in China (Inner Mongolia and Heilongjiang), northern and western Mongolia, and Russia (southwest Siberia, Tuva, Transbaikalia). In the Mongolian Altai the range overlaps with that of the Gray marmot. The species was classified as endangered by the IUCN in 2008.
Two subspecies are recognized: