McClellan Park, CA has a population of 1,093 and is the 14,588th largest city in the United States. The population density is 271 per sq mi which is 17% higher than the California average and 199% higher than the national average. The median age in McClellan Park is 33 which is approximately 9% lower than the California average of 36. In McClellan Park, 25% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 67% of McClellan Park residents were born in California, 25% were born out of state, 0% were born outside of the United States and 8% were foreign born.