Phoenix is the capital and the most populous city of the U.S. state of Arizona and the county seat of Maricopa County. It is the most populous capital city in the United States. Its physical location is along the banks of the normally dry Salt River. It was incorporated as a city on February 25, 1881. Residents of Phoenix are known as Phoenicians. Phoenix apartments for rent comparison page shows most up to date rent information on Phoenix apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.