# Counties in Arizona by population, 2025

All 15 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/arizona-counties
- CSV: https://invokely.ai/download/rankings/population/arizona-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | Maricopa County | 4,689,558 |
| 2 | Pima County | 1,074,685 |
| 3 | Pinal County | 539,380 |
| 4 | Yavapai County | 252,552 |
| 5 | Mohave County | 228,102 |
| 6 | Yuma County | 224,449 |
| 7 | Coconino County | 144,368 |
| 8 | Cochise County | 126,332 |
| 9 | Navajo County | 109,946 |
| 10 | Apache County | 64,445 |
| 11 | Gila County | 53,801 |
| 12 | Santa Cruz County | 50,020 |
| 13 | Graham County | 40,157 |
| 14 | La Paz County | 16,711 |
| 15 | Greenlee County | 9,312 |