Inya (Russian: Иня́) is a river in Kemerovo and Novosibirsk Oblasts of Russia. It is a right tributary of the Ob River. It is 663 kilometres (412 mi) long, with a drainage basin of 17,600 square kilometres (6,800 sq mi). The Inya has its sources in a ridge in the central part of the Kuznetsk Basin, and flows through Kemerovo Olast in a mainly westerly direction, then enters Novosibirsk Oblast and finally joins the Ob River, just 5 kilometres (3 mi) southeast of downtown Novosibirsk. The river freezes over in the beginning of November, and stays frozen till the spring thaw starts in mid-April.