Santa Paula is a city within Ventura County, California, United States. The population was 28,598 at the 2000 census. It has been dubbed the 'Citrus Capital of the World.' As the initial headquarters of the company that became Unocal, it was one of the early centers of California's enormous petroleum industry. Santa Paula apartments for rent comparison page shows most up to date rent information on Santa Paula apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.