Hidden Hills, CA has a population of 1,573 and is the 12,419th largest city in the United States. The population density is 932 per sq mi which is 301% higher than the California average and 928% higher than the national average. The median age in Hidden Hills is 49 which is approximately 37% higher than the California average of 36. In Hidden Hills, 65% of the population over 15 years of age are married, 87% speak English and 4% speak Spanish. 61% of Hidden Hills residents were born in California, 25% were born out of state, 2% were born outside of the United States and 13% were foreign born.