Carefree, AZ has a population of 3,580 and is the 7,943rd largest city in the United States. The population density is 407 per sq mi which is 607% higher than the Arizona average and 349% higher than the national average. The median age in Carefree is 66 which is approximately 78% higher than the Arizona average of 37. In Carefree, 73% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 11% of Carefree residents were born in Arizona, 84% were born out of state, 1% were born outside of the United States and 3% were foreign born.