Ventura is outside of Southern California.
Southern California . The region is traditionally described as eight counties , based on demographics and economic ties : Imperial , Los Angeles , Orange , Riverside , San Bernardino , San Diego , Santa Barbara , and Ventura . The Ventura Freeway is a freeway in southern California , United States , running from the Santa Barbara/Ventura county line to Pasadena . The Ventura River , located in western Ventura County in southern California , United States , flows through an eponymous narrow valley with steeply sloped sides .