Elgin, AZ has a population of 148 and is the 25,707th largest city in the United States. The population density is 25 per sq mi which is 57% lower than the Arizona average and 73% lower than the national average. The median age in Elgin is 56 which is approximately 51% higher than the Arizona average of 37. In Elgin, 91% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 27% of Elgin residents were born in Arizona, 73% were born out of state, 0% were born outside of the United States and 0% were foreign born.