First Mesa, AZ has a population of 1,737 and is the 11,862nd largest city in the United States. The population density is 110 per sq mi which is 92% higher than the Arizona average and 22% higher than the national average. The median age in First Mesa is 31 which is approximately 18% lower than the Arizona average of 37. In First Mesa, 42% of the population over 15 years of age are married, 55% speak English and 0% speak Spanish. 91% of First Mesa residents were born in Arizona, 7% were born out of state, 0% were born outside of the United States and 1% were foreign born.