Marina, CA has a population of 20,816 and is the 2,077th largest city in the United States. The population density is 2,342 per sq mi which is 908% higher than the California average and 2485% higher than the national average. The median age in Marina is 37 which is approximately 3% higher than the California average of 36. In Marina, 47% of the population over 15 years of age are married, 64% speak English and 16% speak Spanish. 53% of Marina residents were born in California, 21% were born out of state, 3% were born outside of the United States and 23% were foreign born.