Los Altos Hills /lɔːs ˈæltoʊs ˈhɪlz/ is an incorporated town in Santa Clara County, California, United States. The population was 7,922 at the 2010 census. It is one of the wealthiest towns in the San Francisco Bay Area and in the country. In 2013, Forbes ranked Los Altos Hills as the 2nd most expensive zip code in America with a median home price of $5.4 million.