Carefree is a town in Maricopa County, Arizona, United States. As of the 2010 United States Census, the population of the town is 3,363.Characterised as an upscale residential area, Carefree was conceived in the mid-1950s by business partners K.T. Palmer and Tom Darlington as a master-planned community. Land sales commenced in 1955 and homebuilding followed shortly thereafter in 1958. According to the United States Census Bureau, the town has a total area of 8.9 square miles (23 km2), all of it land.