Ranking of Arizona Counties By Population in 2018

Updated on January 28, 2024.

Based on the US Census Vintage data estimates, in 2018, the Population for Arizona was 7.16M. Among all Arizona counties, Maricopa County had the highest population (4.41M), followed by Pima County (1.04M), and Pinal County (446.52K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Arizona counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Arizona Counties By Population in 2018
Maricopa
Pima
Pinal
Yavapai
Yuma
Mohave
Coconino
Cochise
Navajo
Apache
Ranking of Arizona Counties By Population in 2018
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Rank County Population
1 Maricopa County 4405306
2 Pima County 1037746
3 Pinal County 446524
4 Yavapai County 232467
5 Yuma County 211245
6 Mohave County 210371
7 Coconino County 142914
8 Cochise County 126581
9 Navajo County 110490
10 Apache County 71819
11 Gila County 53833
12 Santa Cruz County 46446
13 Graham County 38032
14 La Paz County 21030
15 Greenlee County 9424