| Alån | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sweden |
| Length: | 70m (230feet) |
| Mouth Location: | Ersnäs |
| Mouth Coordinates: | 63.5222°N 21.8389°W |
| Basin Size: | 592.2km2[1] |
Alån is a river in Norrbotten County, Sweden. It has a meander length of approximately 70km (40miles) It has a catchment area 592km2, of which almost 10% consists of lakes. Alån flows from Lake Långsjön in the municipality of Boden and then into Slyträsket, 87 meters above sea level; it then flows through the larger lake Alträsket, then through Västmarkssjön, north to Vändträsket then south again to Mockträsket before finally emptying in the Gulf of Bothnia at Ersäs in the municipality of Luleå.
The most important section of the river is at Selet's mill, where the 19th-century industrial area has been restored including the dam. The most important source flows are the Hattbäcken and Sjöån streams. The largest tributary is Bjurbäcken (Bodbäcken) from Bjursträsket, which extends from the west in Alån at Alvik. Alån is often mistakenly called Aleån the last mile to the sea.