| Iijoki | |
| Mouth Coordinates: | 65.3231°N 25.3583°W |
| Subdivision Type1: | Country |
| Length: | 370km (230miles) |
| Basin Size: | 14191km2 |
Iijoki (Swedish: Ijo älv) is a river of Finland in the region of North Ostrobothnia. The river has many tributaries.[1] It flows for 370km (230miles) into the Gulf of Bothnia. Some of its main tributaries are Siuruanjoki and Livojoki. It has about 150 rapids.
Kalle Päätalo has written a 26 part novel; Juuret Iijoen törmässä.