Maricopa County Flag

Maricopa County

State:
Arizona
County Seat:
Phoenix

Maricopa County's estimated 2025 population is 4,645,947 with a growth rate of 0.65% in the past year according to the most recent United States census data. Maricopa County is the 1st largest county in Arizona. The 2010 population was 3,825,183 and has seen a growth of 21.46% since that time.

4,645,947
Total Population
505
Population Density (mi²)
1
Population Rank (State)
30K 0.65%
Annual Population Growth

Maricopa County Population

Demographics

Economics and Income Statistics