Maricopa County Flag

Maricopa County

State:
Arizona
County Seat:
Phoenix

Maricopa County's estimated 2026 population is 4,724,969 with a growth rate of 0.76% in the past year according to the most recent United States census data. Maricopa County is the largest county in Arizona. The 2010 population was 3,825,183 and has seen a growth of 23.52% since that time.

4,724,969
Total Population
513
Population Density (mi²)
1
Population Rank (State)
35.4K 0.76%
Annual Population Growth

Maricopa County Population

Demographics

Economics and Income Statistics