High elevation view of cityscape at sunset

Maricopa County

Maricopa County is one of the largest, most scenic and fastest-growing counties in the United States. Home of the Arizona Capitol and more than half of the state’s population, the metropolitan area of Maricopa County is Arizona’s political and economic center.

Room For Growth

The land area of Maricopa County is larger than six states: Rhode Island, Delaware, Connecticut, Hawaii, New Jersey, Massachusetts and New Hampshire.

Source: GPEC Analysis

Explore the Outdoors

Maricopa County boasts one of the largest regional park systems in the United States.

Catch a Game

Maricopa County has a professional team in every major sports league and hosts 15 MLB teams for Spring Training each year.


Maricopa County’s population is over 4 million, making it the fourth-largest county in the U.S.

Source: US Census Annual Estimates of Resident Population, 2019


The county’s population is projected to grow 14.0% from 2019 to 2029.

Source: Arizona Office of Economic Opportunity


Maricopa County is home to 62% of the state’s population

Source: Census Quick Facts 2019

Discover the partnership between
Maricopa County and GPEC.

Maricopa County Competes