Del Rey Oaks, CA has a population of 1,683 and is the 12,036th largest city in the United States. The population density is 3,506 per sq mi which is 1409% higher than the California average and 3770% higher than the national average. The median age in Del Rey Oaks is 47 which is approximately 30% higher than the California average of 36. In Del Rey Oaks, 60% of the population over 15 years of age are married, 81% speak English and 9% speak Spanish. 57% of Del Rey Oaks residents were born in California, 27% were born out of state, 2% were born outside of the United States and 14% were foreign born.