El Sobrante, CA has a population of 15,374 and is the 2,773rd largest city in the United States. The population density is 2,128 per sq mi which is 816% higher than the California average and 2249% higher than the national average. The median age in El Sobrante is 36 which is approximately equal to the California average of 36. In El Sobrante, 67% of the population over 15 years of age are married, 64% speak English and 15% speak Spanish. 57% of El Sobrante residents were born in California, 20% were born out of state, 1% were born outside of the United States and 22% were foreign born.