Calabasas is an affluent city in Los Angeles County, California in the western United States. It is located in the hills in the southwestern San Fernando Valley and the Santa Monica Mountains between Woodland Hills, Agoura Hills, West Hills, and Malibu, California. As of the 2010 census, the city population was 23,058, up from 20,033 at the 2000 census, according to the U.S. Census Bureau website, factfinder.census.gov. The city was formally incorporated in 1991. Prior to that the area was an unincorporated portion of Los Angeles County.
The Leonis Adobe, an adobe structure in Old Town Calabasas, dates from 1844 and is one of the oldest buildings in the greater Los Angeles area.
It is generally accepted that Calabasas as the city name is derived from the Spanish calabaza meaning "pumpkin," "squash," or "gourd." Some historians hold the theory that Calabasas is a translation of the Chumash word calahoosa.