Maricopa County, Arizona

Maricopa County (/ˌmærɪˈkoʊpə/ MARR-i-KOH-pə) is a county in the south-central part of the U.S. state of Arizona. As of the 2020 census, its population was 4,420,568,^[1] making it the state's most populous county. It is more populous than 23 states.

Maricopa County
County
The Maricopa County Courthouse and Old Phoenix City Hall, also known as the County-City Administration Building, in 2013
Flag
Location within the U.S. state of Arizona
Arizona's location within the U.S.
Coordinates: 33°30′50″N 112°28′33″W
Country	United States
State	Arizona
Founded	February 14, 1871
Named for	Maricopa people
Seat	Phoenix
Largest city	Phoenix
Area
• Total	9,224 sq mi (23,890 km2)
• Land	9,200 sq mi (24,000 km2)
• Water	24 sq mi (60 km2)  0.3%
Population  (2020)[1]
• Total	4,420,568
• Density	480/sq mi (190/km2)
Time zone	UTC−7 (Mountain)
Website	www.maricopa.gov

The county seat is Phoenix,^[2] the state capital and fifth-most populous city in the country.