Arizona Population By County in 2018
Updated on May 9, 2021.

According to the US Census Bureau population estimates, there were 7,158,024 people living in Arizona in 2018. Maricopa was the most populated county with 4,402,403 residents, followed by Pima with 1,036,554 residents, and Pinal with 446,806 residents. Greenlee with a population of 9,448 was the least populated county in Arizona in 2018.

Use the map below to interactively explore the population of each county in Arizona in 2018. The data can also be explored further by sorting and filtering with the table below.

Hover/Click on the counties to see the values.
Arizona Population By County in 2018
See also Population estimate for other years:
Table of Arizona Population By County in 2018
Items per page:
0 of 0
County Population % of State Population
Apache 71,731 1.00%
Cochise 126,411 1.77%
Coconino 142,523 1.99%
Gila 53,801 0.75%
Graham 37,995 0.53%
Greenlee 9,448 0.13%
La Paz 21,039 0.29%
Maricopa 4,402,403 61.50%
Mohave 209,292 2.92%
Navajo 110,242 1.54%
Pima 1,036,554 14.48%
Pinal 446,806 6.24%
Santa Cruz 46,395 0.65%
Yavapai 231,772 3.24%
Yuma 211,612 2.96%