King City, MO has a population of 914 and is the 15,700th largest city in the United States. The population density is 661 per sq mi which is 666% higher than the Missouri average and 630% higher than the national average. The median age in King City is 39 which is approximately 2% higher than the Missouri average of 38. In King City, 63% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 87% of King City residents were born in Missouri, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.