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Maricopa County, Arizona

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Maricopa County, Arizona
CountyMaricopa County
StateArizona
FoundedFebruary 14, 1871
SeatPhoenix
Largest cityPhoenix
Area total sq mi9,224
Area land sq mi9,200
Area water sq mi24
Population as of2020
Population total4,420,568
Population density sq mi480.5
Time zoneMountain (no DST)
Webwww.maricopa.gov
Named forThe Maricopa people

Maricopa County, Arizona is the most populous county in Arizona and the fourth-most populous in the United States, anchored by the state capital and largest city, Phoenix. Established by the Arizona Territorial Legislature in 1871, it is a major economic and cultural hub of the Southwestern United States. The county encompasses a diverse landscape ranging from the Sonoran Desert to rugged mountain ranges and is a center for high-tech industry, agriculture, and government.

History

The area has been inhabited for millennia by indigenous peoples, including the Hohokam, whose extensive canal systems laid the groundwork for modern irrigation. European contact began with Spanish explorers like Father Eusebio Kino in the late 17th century. Following the Gadsden Purchase of 1853, the region became part of the United States, and the county was officially created in 1871, named for the Maricopa people. The founding of Phoenix in 1868 and the arrival of the Southern Pacific Railroad in the 1880s spurred growth, with the Salt River Project and the construction of Roosevelt Dam enabling large-scale agriculture and settlement. The post-World War II boom, bolstered by air conditioning and defense industries like Luke Air Force Base, transformed the region into a major metropolitan area.

Geography

According to the United States Census Bureau, the county has a total area of 9,224 square miles, making it larger than several U.S. states. It is dominated by the Sonoran Desert, featuring iconic saguaro cactus and bounded by mountain ranges such as the McDowell Mountains, Superstition Mountains, and White Tank Mountains. Major waterways include the Salt River and the Gila River, with significant reservoirs like Lake Pleasant and Canyon Lake. The county borders Yavapai County to the north, Gila County and Pinal County to the east, and Yuma County to the southwest.

Demographics

The 2020 United States Census recorded a population of over 4.4 million residents. The racial and ethnic composition is diverse, with significant Non-Hispanic White, Hispanic or Latino, Black or African American, American Indian, and Asian communities. Major cities include Phoenix, Mesa, Chandler, Glendale, Scottsdale, Gilbert, Tempe, and Peoria. The Phoenix Metropolitan Area, also known as the Valley of the Sun, is a primary destination for domestic migration.

Economy

The county has a robust and diversified economy. It is a national leader in high-tech manufacturing, serving as a major hub for companies like Intel, which operates its Ocotillo Campus in Chandler. Other key sectors include financial services with firms like American Express and Vanguard, healthcare with the Mayo Clinic and Banner Health, and tourism centered on golf, resorts, and events like the Waste Management Phoenix Open and the Super Bowl. Significant agriculture remains, particularly cotton, citrus, and cattle.

Government and politics

The county is governed by a five-member Board of Supervisors, with an elected County Sheriff, County Attorney, and County Assessor. The Maricopa County Sheriff's Office has been led by notable figures such as Joe Arpaio. The county is a critical political battleground in Arizona and national elections, housing the headquarters of the Arizona Republican Party and the Arizona Democratic Party. It has been the focus of significant political events, including the Arizona audit of the 2020 United States presidential election.

Education

Higher education is served by major institutions like Arizona State University in Tempe, the University of Arizona College of Medicine – Phoenix, and the Maricopa County Community College District, one of the largest such systems in the U.S., which includes Phoenix College and Mesa Community College. Primary and secondary education is provided by numerous districts, including the Phoenix Union High School District and Mesa Public Schools. The county is also home to the Arizona Science Center and the Phoenix Art Museum.

Transportation

The county is a major transportation nexus for the Southwestern United States. Phoenix Sky Harbor International Airport is one of the busiest airports in the world. The regional freeway system includes Interstate 10, Interstate 17, the Papago Freeway, and the Loop 202. Public transit is managed by Valley Metro, which operates an expanding light rail system connecting Phoenix, Tempe, and Mesa. Major freight rail service is provided by the Union Pacific Railroad and BNSF Railway.

Category:Maricopa County, Arizona Category:Counties in Arizona Category:1871 establishments in Arizona Territory