Ventura (officially the City of San Buenaventura; commonly called San Buenaventura before 1891), or Shisholop in Chumash is the county seat of Ventura County, California, United States, incorporated in 1866. The population was 106,433 at the 2010 census, up from 100,916 at the 2000 census. Ventura is accessible via U.S.