The 805 area code is located in California and covers Oxnard, Simi Valley, Thousand Oaks, San Buenaventura (Ventura), and Santa Maria. It serves Western San Luis Obispo and Santa Barbara counties and northern portions of Ventura county; portions of 805 are located in the Ventura Metropolitan Statistical Area (MSA) which is one of the top 100 MSAs. The area code was created in 1957 when it was split from 213, and in 1999, it was reduced in size by the creation of area code 661.