Pacifica, CA has a population of 38,844 and is the 1,070th largest city in the United States. The population density is 3,068 per sq mi which is 1220% higher than the California average and 3286% higher than the national average. The median age in Pacifica is 42 which is approximately 16% higher than the California average of 36. In Pacifica, 56% of the population over 15 years of age are married, 74% speak English and 10% speak Spanish. 61% of Pacifica residents were born in California, 17% were born out of state, 2% were born outside of the United States and 20% were foreign born.