Oroville is the county seat of Butte County, California, United States. The population of the city was 15,506 at the 2010 census, up from 13,004 in the 2000 census. Following the 2018 Camp Fire that destroyed much of the town of Paradise, the population of Oroville increased as many people who lost their homes relocated to nearby Oroville. In 2019, the California Department of Finance estimated the population of Oroville is 20,737.
Oroville is considered the gateway to Lake Oroville and Feather River recreational areas. The Berry Creek Rancheria of Maidu Indians of California is headquartered in Oroville.
Oroville is located adjacent to State Route 70, and is in close proximity to State Route 99, which connects Butte County with Interstate 5. The city of Chico, California, is located about 22 minutes northwest of the city, and the state capitol of Sacramento lies about an hour due south.
Oroville's nickname is the "City of Gold." Oroville has also been a Tree City USA for 38 years by the National Arbor Day Foundation.
Oroville is situated at the base of the foothills on the banks of the Feather River where it flows out of the Sierra Nevada onto the flat floor of the Sacramento Valley. It was established as the home base of navigation on the Feather River to supply gold miners during the California Gold Rush.
The town was originally named "Ophir City", but was later changed to Oroville when the first post office opened in 1854 (oro is the Spanish word for "gold").