King City, CA has a population of 13,532 and is the 3,090th largest city in the United States. The population density is 3,520 per sq mi which is 1415% higher than the California average and 3785% higher than the national average. The median age in King City is 27 which is approximately 24% lower than the California average of 36. In King City, 49% of the population over 15 years of age are married, 14% speak English and 84% speak Spanish. 45% of King City residents were born in California, 5% were born out of state, 1% were born outside of the United States and 50% were foreign born.