Maricopa is a city in the Gila River Valley in the U.S. state of Arizona. Incorporated in 2003, it is the nineteenth largest city in the state with a population of 43,482 as of April 2010. Maricopa is the second most populous incorporated city in Pinal County and forms part of the Phoenix metropolitan area, the 12th largest metropolitan area in the United States.
Maricopa has had three locations over the years: Maricopa Wells, Maricopaville and Maricopa Junction which gradually became known as Maricopa. Each stage of its life has contributed greatly to the growth and development of the Southwest. Its conception took place at a series of watering holes eight miles north of present day Maricopa, and about a mile west of Pima Butte. It was called Maricopa Wells. Several of Arizona’s rivers, the Gila, Santa Cruz, Vekol and Santa Rosa provided this oasis in the desert with an ample supply of water during this period of time.