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 21,773 , an increase of more than 20 % from the 2018 population estimate
Camp Fire
Camp Fire (2018)
Oroville, California