Ranking of Arizona Counties By Population in 2020
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2020, the Population for Arizona was 7.19M. Among all Arizona counties, Maricopa County had the highest population (4.45M), followed by Pima County (1.05M), and Pinal County (430.21K).
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.
Related Topics: Arizona Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2020 Census.
See this for other years:
Ranking of Arizona Counties By Population in 2020
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| Rank | County | Population |
|---|---|---|
| 1 | Maricopa County | 4445415 |
| 2 | Pima County | 1045227 |
| 3 | Pinal County | 430213 |
| 4 | Yavapai County | 237228 |
| 5 | Mohave County | 214173 |
| 6 | Yuma County | 205665 |
| 7 | Coconino County | 145190 |
| 8 | Cochise County | 125533 |
| 9 | Navajo County | 106773 |
| 10 | Apache County | 65917 |
| 11 | Gila County | 53355 |
| 12 | Santa Cruz County | 47712 |
| 13 | Graham County | 38630 |
| 14 | La Paz County | 16573 |
| 15 | Greenlee County | 9531 |