| # | County | Risk Index score |
|---|---|---|
| 1 | Maricopa County | 99.9 |
| 2 | Pima County | 99.1 |
| 3 | Mohave County | 94.8 |
| 4 | Coconino County | 94.2 |
| 5 | Pinal County | 93.8 |
| 6 | Yavapai County | 93.7 |
| 7 | Cochise County | 92.8 |
| 8 | Yuma County | 92.6 |
| 9 | Gila County | 90.2 |
| 10 | Santa Cruz County | 88.3 |
| 11 | Navajo County | 88.1 |
| 12 | La Paz County | 83.5 |
| 13 | Apache County | 78.8 |
| 14 | Graham County | 64.6 |
| 15 | Greenlee County | 12.4 |
Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Natural Hazard Risk in Arizona”, https://gismap.land/rankings/arizona/highest-risk-counties. Figures from FEMA National Risk Index (December 2025).
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