Mountainaire, AZ has a population of 1,150 and is the 14,294th largest city in the United States. The population density is 113 per sq mi which is 96% higher than the Arizona average and 25% higher than the national average. The median age in Mountainaire is 39 which is approximately 5% higher than the Arizona average of 37. In Mountainaire, 60% of the population over 15 years of age are married, 88% speak English and 9% speak Spanish. 24% of Mountainaire residents were born in Arizona, 68% were born out of state, 1% were born outside of the United States and 8% were foreign born.