Area code 805 is a California telephone area code that was split from area code 213 in 1957. It includes most or all of the California counties of San Luis Obispo, Santa Barbara, and Ventura, plus southernmost portions of Monterey County. On February 13, 1999, it was split again, with area code 661 having been created for the inland areas, which are San Joaquin Valley, Santa Clarita Valley, and Antelope Valley.