Oulu can refer to:
Astronomy
- 1512 Oulu (1939 FE), an asteroid
Places
- Finland
- Oulu, a city and municipality in Finland (Uleåborg)
- Oulu Province, one of the provinces of Finland (Oulun lääni/Uleåborgs län)
- University of Oulu, a university located in Oulu
- Oulu railway station
- Oulu Airport
- Port of Oulu
- Oulujoki, a river
- Oulujärvi, a lake
- United States
- Oulu, Wisconsin, a town
- Oulu (community), Wisconsin, an unincorporated community