Thatcher, AZ has a population of 4,972 and is the 6,512th largest city in the United States. The population density is 760 per sq mi which is 1222% higher than the Arizona average and 739% higher than the national average. The median age in Thatcher is 27 which is approximately 27% lower than the Arizona average of 37. In Thatcher, 56% of the population over 15 years of age are married, 89% speak English and 10% speak Spanish. 72% of Thatcher residents were born in Arizona, 27% were born out of state, 0% were born outside of the United States and 1% were foreign born.