Utah earthquake risk
Salt Lake County has the highest earthquake risk in Utah, scoring 99.6 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Salt Lake County | 99.6 | Relatively High |
| 2 | Utah County | 98.8 | Relatively High |
| 3 | Davis County | 98 | Relatively Moderate |
| 4 | Weber County | 97.7 | Relatively Moderate |
| 5 | Cache County | 94.6 | Relatively Moderate |
| 6 | Box Elder County | 93.3 | Relatively Moderate |
| 7 | Sevier County | 87 | Relatively Low |
| 8 | Iron County | 86.8 | Relatively Low |
| 9 | Tooele County | 83.6 | Relatively Low |
| 10 | Sanpete County | 83.4 | Relatively Low |
| 11 | Millard County | 83.2 | Relatively Low |
| 12 | Washington County | 81.1 | Relatively Low |
| 13 | Juab County | 79.3 | Relatively Low |
| 14 | Beaver County | 74.4 | Relatively Low |
| 15 | Emery County | 66 | Relatively Low |
| 16 | Carbon County | 64.9 | Relatively Low |
| 17 | Garfield County | 64.1 | Relatively Low |
| 18 | Duchesne County | 60 | Relatively Low |
| 19 | Wasatch County | 59 | Very Low |
| 20 | Uintah County | 56.9 | Very Low |
| 21 | San Juan County | 55.7 | Very Low |
| 22 | Summit County | 55.5 | Very Low |
| 23 | Piute County | 49.2 | Very Low |
| 24 | Wayne County | 47.8 | Very Low |
| 25 | Kane County | 37.9 | Very Low |
| 26 | Rich County | 36.8 | Very Low |
| 27 | Morgan County | 32.9 | Very Low |
| 28 | Grand County | 32.7 | Very Low |
| 29 | Daggett County | 18.9 | Very Low |
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.
Earthquake risk nationally:
Other hazard risks in Utah:
Frequently asked questions
What is the highest earthquake risk county in Utah?
Salt Lake County, UT has the highest earthquake risk in Utah, with a FEMA National Risk Index score of 99.6 out of 100 (rated "Relatively High").
What causes earthquake risk in Utah?
Earthquake risk reflects expected annual losses from ground shaking. High scores concentrate in California, the Pacific Northwest, Alaska, and the New Madrid Seismic Zone (spanning Missouri, Arkansas, Tennessee, and neighboring states). NOAA's Storm Events Database does not track earthquakes, so recorded event counts are not shown.