
Country: United States of America With 504,258 residents counted in 2020, Mesa ranks as Arizona’s third-most populous city and the 38th largest in the United States. It is also the country’s most populous city that is not a county seat, and the biggest community in the East Valley of the Phoenix metropolitan area. Mesa shares borders with Tempe, Chandler, Gilbert, Queen Creek, Apache Junction and the Salt River Pima–Maricopa Indian Community.
