Hidden Hills, California

Hidden Hills is in the southern Simi Hills Transverse range near the Santa Monica Mountains.

The community was designed and developed in the 1950s by A.E. Hanson, a renowned Southern California landscape architect and planned community developer. His earlier projects included Rolling Hills and Palos Verdes Estates and the 1920s Beverly Hills Harold Lloyd Estate 'Greenacres.' It is a gated residential community with a total all land area of 1.7 square miles (4.4 km2). An elementary school is publicly accessible at one of the three gates to the community. The city has a summer camp for children, community and children's theatre programs, annual parades, carnivals, parties, welcome wagon, snow days and weekly community-wide barbecues all summer long.

Hidden Hills is bordered on the north by the nature reserve and greenbelt of the Upper Las Virgenes Canyon Open Space Preserve, a park with miles of equestrian, hiking and mountain biking trails. Nearby to the south is the pioneer Leonis Adobe National Historic Landmark, with gardens and a historical Museum. It's across the historic El Camino Real of the Spanish Las Californias and Mexican Alta California eras, now U.S. Route 101.

The city was the setting of a short-lived NBC sitcom called Hidden Hills, which aired in 2002–2003.The Los Angeles Times found the median annual household income in Hidden Hills to be about $210,000. Hidden Hills has been identified as being among the most affluent municipalities in the United States.