Utah landslide risk
Washington County has the highest landslide risk in Utah, scoring 98.6 out of 100 — rated "Relatively High" by FEMA's National Risk Index. Recorded landslide events across Utah have increased 300% over the past five years compared to the prior five-year period.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Washington County | 98.6 | Relatively High | 2 |
| 2 | San Juan County | 98.5 | Relatively High | 24 |
| 3 | Garfield County | 96.2 | Relatively Moderate | 0 |
| 4 | Wasatch County | 95.6 | Relatively Moderate | 0 |
| 5 | Kane County | 94.8 | Relatively Moderate | 0 |
| 6 | Davis County | 94.7 | Relatively Moderate | 1 |
| 7 | Wayne County | 94.2 | Relatively Moderate | 0 |
| 8 | Beaver County | 93.1 | Relatively Moderate | 0 |
| 9 | Piute County | 93 | Relatively Moderate | 0 |
| 10 | Summit County | 92.3 | Relatively Moderate | 0 |
| 11 | Iron County | 90.9 | Relatively Moderate | 1 |
| 12 | Morgan County | 90.3 | Relatively Moderate | 0 |
| 13 | Duchesne County | 89.6 | Relatively Moderate | 4 |
| 14 | Salt Lake County | 86.4 | Relatively Low | 2 |
| 15 | Uintah County | 86 | Relatively Low | 0 |
| 16 | Rich County | 85.2 | Relatively Low | 0 |
| 17 | Cache County | 84.5 | Relatively Low | 0 |
| 18 | Grand County | 82.4 | Relatively Low | 10 |
| 19 | Emery County | 80.5 | Relatively Low | 3 |
| 20 | Carbon County | 80 | Relatively Low | 2 |
| 21 | Sevier County | 79.8 | Relatively Low | 0 |
| 22 | Sanpete County | 79.1 | Relatively Low | 0 |
| 23 | Utah County | 76 | Relatively Low | 5 |
| 24 | Daggett County | 61.8 | Very Low | 0 |
| 25 | Box Elder County | 46.9 | Very Low | 0 |
| 26 | Weber County | 46.9 | Very Low | 0 |
| 27 | Juab County | 37.1 | Very Low | 0 |
| 28 | Tooele County | 33.7 | Very Low | 0 |
| 29 | Millard County | 26 | 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 Utah:
Frequently asked questions
What is the highest landslide risk county in Utah?
Washington County, UT has the highest landslide risk in Utah, with a FEMA National Risk Index score of 98.6 out of 100 (rated "Relatively High").
What causes landslide risk in Utah?
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.