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 km2.
Police, Poland (on the confluence of Ina River into the Oder)
In Pomeranian history, the Ihna from 1295 to 1464 separated Pomerania-Stettin and Pomerania-Wolgast. In the 16th century, it was one of the first European rivers to have its channel straightened, and was an important shipping artery up to WWII. Tributaries of the Ina are: Krępiel, Mała Ina, Reczek, Struga Goleniowska.