Eloy, AZ has a population of 17,128 and is the 2,508th largest city in the United States. The population density is 151 per sq mi which is 132% higher than the Arizona average and 67% higher than the national average. The median age in Eloy is 34 which is approximately 8% lower than the Arizona average of 37. In Eloy, 31% of the population over 15 years of age are married, 48% speak English and 48% speak Spanish. 38% of Eloy residents were born in Arizona, 39% were born out of state, 1% were born outside of the United States and 23% were foreign born.