El Centro, CA has a population of 43,699 and is the 940th largest city in the United States. The population density is 3,916 per sq mi which is 1585% higher than the California average and 4223% higher than the national average. The median age in El Centro is 33 which is approximately 9% lower than the California average of 36. In El Centro, 52% of the population over 15 years of age are married, 20% speak English and 77% speak Spanish. 56% of El Centro residents were born in California, 7% were born out of state, 3% were born outside of the United States and 34% were foreign born.