Oroville is the county seat of Butte County, California. The population was 13,004 at the 2000 census; as of 2007, the population is 14,443. The estimated population of the Greater Oroville area is around 55,000 people. Oroville apartments for rent comparison page shows most up to date rent information on Oroville apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.