Camp Pendleton South, CA has a population of 12,491 and is the 3,306th largest city in the United States. The population density is 3,192 per sq mi which is 1274% higher than the California average and 3423% higher than the national average. The median age in Camp Pendleton South is 22 which is approximately 40% lower than the California average of 36. In Camp Pendleton South, 76% of the population over 15 years of age are married, 90% speak English and 8% speak Spanish. 24% of Camp Pendleton South residents were born in California, 67% were born out of state, 2% were born outside of the United States and 7% were foreign born.