Manhattan Beach, CA has a population of 35,573 and is the 1,186th largest city in the United States. The population density is 9,035 per sq mi which is 3788% higher than the California average and 9872% higher than the national average. The median age in Manhattan Beach is 44 which is approximately 21% higher than the California average of 36. In Manhattan Beach, 63% of the population over 15 years of age are married, 85% speak English and 5% speak Spanish. 53% of Manhattan Beach residents were born in California, 34% were born out of state, 2% were born outside of the United States and 11% were foreign born.