Hidden Hills is a city and gated community in the Santa Monica Mountains region of Los Angeles County, California. It is located next to the city of Calabasas. It is notable for being home to many a…Hidden Hills is a city and gated community in the Santa Monica Mountains region of Los Angeles County, California. It is located next to the city of Calabasas. It is notable for being home to many actors and celebrities. The population was 1,725 at the 2020 census.
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