Arizona Population By County in 2020

Based on the US Census Vintage data estimates, in 2020, the population of Arizona was 7,179,943. Among all Arizona counties, Maricopa[object Promise] had the highest population (4,440,232), followed by Pima[object Promise] (1,045,175), and Pinal[object Promise] (429,446). Greenlee[object Promise] was the least populated county (9,526).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.