Imperial Beach, CA has a population of 27,180 and is the 1,589th largest city in the United States. The population density is 6,532 per sq mi which is 2711% higher than the California average and 7110% higher than the national average. The median age in Imperial Beach is 32 which is approximately 12% lower than the California average of 36. In Imperial Beach, 45% of the population over 15 years of age are married, 52% speak English and 40% speak Spanish. 53% of Imperial Beach residents were born in California, 23% were born out of state, 2% were born outside of the United States and 21% were foreign born.