Oroville
- County:
- Butte County
- County Seat:
- Yes
- Area (mi²):
- 13.898
- State:
- California
Oroville is a city located in Butte County, California. Oroville has a 2026 population of 19,712. It is also the county seat of Butte County. Oroville is currently growing at a rate of 0.81% annually but its population has decreased by -1.63% since the most recent census, which recorded a population of 20,039 in 2020.