The Tom (Russian: Томь) is a river in Russia, a right tributary of the Ob in central Siberia. Its watershed lies within the Republic of Khakassia, Kemerovo Oblast, and Tomsk Oblast. It is 827 kilometres long, and has a drainage basin of 62,000 square kilometres.
The Tom flows from the Abakan Range (a northern continuation of the Altai Mountains) northward through the Kuznetsk Basin. It joins the Ob approximately 50 kilometers north of Tomsk.
