Tom (Russian: Томь) is a river in Russia, a right tributary of the Ob. Its length is 540 miles (871 km). Its source is in the Abakan mountains (a northern continuation of the Altay Mountains), and it flows northward through the Kuznetsk Basin. It flows into the Ob approximately 30 miles (50 km) north of Tomsk.
Cities on the Tom River include Mezhdurechensk, Novokuznetsk, Kemerovo, Yurga, Tomsk, and Seversk. The Aba live near the river.