Manteca, CA has a population of 73,570 and is the 484th largest city in the United States. The population density is 3,581 per sq mi which is 1441% higher than the California average and 3852% higher than the national average. The median age in Manteca is 35 which is approximately 4% lower than the California average of 36. In Manteca, 58% of the population over 15 years of age are married, 69% speak English and 22% speak Spanish. 68% of Manteca residents were born in California, 14% were born out of state, 1% were born outside of the United States and 17% were foreign born.