The Ina () is a river in northwestern Poland, a right tributary of the Oder River.
The origins of the river are in Insko Lake (Polish: jezioro Ińsko), and it flows through a succession of smaller lakes. The confluence of Ina River is localized in Police town, near Szczecin. It has a length of 129 km, and the basin area of the Ina is 2189 km<sup>2</sup>.