San Manuel, AZ has a population of 3,725 and is the 7,771st largest city in the United States. The population density is 180 per sq mi which is 213% higher than the Arizona average and 98% higher than the national average. The median age in San Manuel is 44 which is approximately 19% higher than the Arizona average of 37. In San Manuel, 52% of the population over 15 years of age are married, 78% speak English and 21% speak Spanish. 55% of San Manuel residents were born in Arizona, 38% were born out of state, 1% were born outside of the United States and 6% were foreign born.