Arizona Population By County in 2018

Based on the US Census Vintage data estimates, in 2018, the population of Arizona was 7,164,228. Among all Arizona counties, Maricopa[object Promise] had the highest population (4,405,306), followed by Pima[object Promise] (1,037,746), and Pinal[object Promise] (446,524). Greenlee[object Promise] was the least populated county (9,424).

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.