Maricopa County is in the south-central part of the U.S. state of Arizona. As of the 2020 census the population was 4,420,568, or about 62% of the state's total, making it the fourth-most populous county in the United States and the most populous county in Arizona, and making Arizona one of the nation's most centralized states. The county seat is Phoenix, the state capital and fifth-most populous city in the United States.
The Maricopa County Courthouse and Old Phoenix City Hall, also known as the County-City Administration Building, in 2013
Phoenix is the capital and most populous city of the U.S. state of Arizona, with 1,608,139 residents as of 2020. It is the fifth-most populous city in the United States and the most populous state capital in the country.
Image: Phoenix AZ Downtown from airplane (cropped)
Image: 2014, Last Light on a Papago Park Pond panoramio
Image: St. Mary's Basilica 9
Image: Arizona Capitol Museum 2014