Arizona landslide risk
Coconino County has the highest landslide risk in Arizona, scoring 97.4 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Coconino County | 97.4 | Relatively Moderate | 0 |
| 2 | Navajo County | 94 | Relatively Moderate | 0 |
| 3 | Apache County | 93.5 | Relatively Moderate | 0 |
| 4 | Maricopa County | 83.9 | Relatively Low | 0 |
| 5 | Gila County | 77.6 | Relatively Low | 3 |
| 6 | Yavapai County | 70 | Relatively Low | 0 |
| 7 | Santa Cruz County | 69.1 | Relatively Low | 0 |
| 8 | Mohave County | 67 | Relatively Low | 3 |
| 9 | Greenlee County | 63.4 | Relatively Low | 0 |
| 10 | Pima County | 58.7 | Very Low | 8 |
| 11 | La Paz County | 56.2 | Very Low | 0 |
| 12 | Cochise County | 55.1 | Very Low | 0 |
| 13 | Pinal County | 50.8 | Very Low | 3 |
| 14 | Yuma County | 45.9 | Very Low | 0 |
| 15 | Graham County | 42.9 | Very Low | 1 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Landslide risk nationally:
Other hazard risks in Arizona:
Frequently asked questions
What is the highest landslide risk county in Arizona?
Coconino County, AZ has the highest landslide risk in Arizona, with a FEMA National Risk Index score of 97.4 out of 100 (rated "Relatively Moderate").
What causes landslide risk in Arizona?
Landslide risk covers expected losses from hillslope failures, rockfalls, and debris flows triggered by heavy rainfall, snowmelt, wildfire, or earthquakes. High scores concentrate in the Pacific Northwest, California coastal ranges, Appalachians, and Rocky Mountain foothills, where steep terrain combines with intense precipitation or seismic activity.