Colorado earthquake risk
Denver County has the highest earthquake risk in Colorado, scoring 91 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Denver County | 91 | Relatively Moderate |
| 2 | Arapahoe County | 85.5 | Relatively Low |
| 3 | Mesa County | 84.7 | Relatively Low |
| 4 | Adams County | 84.4 | Relatively Low |
| 5 | Jefferson County | 84 | Relatively Low |
| 6 | Alamosa County | 82.5 | Relatively Low |
| 7 | Larimer County | 81 | Relatively Low |
| 8 | Boulder County | 80.5 | Relatively Low |
| 9 | Weld County | 77.8 | Relatively Low |
| 10 | Montrose County | 77.3 | Relatively Low |
| 11 | El Paso County | 75.1 | Relatively Low |
| 12 | La Plata County | 70.9 | Relatively Low |
| 13 | Rio Grande County | 68.8 | Relatively Low |
| 14 | Delta County | 68.3 | Relatively Low |
| 15 | Pueblo County | 66.5 | Relatively Low |
| 16 | Douglas County | 62.4 | Relatively Low |
| 17 | Garfield County | 62 | Relatively Low |
| 18 | Montezuma County | 61.9 | Relatively Low |
| 19 | Eagle County | 53.2 | Very Low |
| 20 | Moffat County | 49.7 | Very Low |
| 21 | Broomfield County | 48 | Very Low |
| 22 | Routt County | 47 | Very Low |
| 23 | Summit County | 46.9 | Very Low |
| 24 | Grand County | 46.6 | Very Low |
| 25 | Conejos County | 46.5 | Very Low |
| 26 | Archuleta County | 46.3 | Very Low |
| 27 | Fremont County | 41.2 | Very Low |
| 28 | Gunnison County | 41.2 | Very Low |
| 29 | Rio Blanco County | 40.6 | Very Low |
| 30 | Morgan County | 40 | Very Low |
| 31 | Chaffee County | 39.8 | Very Low |
| 32 | Pitkin County | 38.2 | Very Low |
| 33 | Saguache County | 37.1 | Very Low |
| 34 | Costilla County | 36.5 | Very Low |
| 35 | Otero County | 35.4 | Very Low |
| 36 | Logan County | 33.7 | Very Low |
| 37 | Dolores County | 32.9 | Very Low |
| 38 | Elbert County | 32.1 | Very Low |
| 39 | San Miguel County | 31.4 | Very Low |
| 40 | Park County | 30 | Very Low |
| 41 | Kit Carson County | 29.6 | Very Low |
| 42 | Prowers County | 29.5 | Very Low |
| 43 | Lake County | 29.4 | Very Low |
| 44 | Ouray County | 27.9 | Very Low |
| 45 | Las Animas County | 26.7 | Very Low |
| 46 | Huerfano County | 26.1 | Very Low |
| 47 | Clear Creek County | 25.7 | Very Low |
| 48 | Gilpin County | 23.7 | Very Low |
| 49 | Teller County | 23.3 | Very Low |
| 50 | Washington County | 22.9 | Very Low |
| 51 | Crowley County | 21.8 | Very Low |
| 52 | Phillips County | 20.8 | Very Low |
| 53 | Baca County | 19.3 | Very Low |
| 54 | Lincoln County | 18.6 | Very Low |
| 55 | Jackson County | 18.1 | Very Low |
| 56 | Yuma County | 17 | Very Low |
| 57 | Bent County | 16.5 | Very Low |
| 58 | Mineral County | 14.4 | Very Low |
| 59 | Sedgwick County | 14.3 | Very Low |
| 60 | Custer County | 14.1 | Very Low |
| 61 | Kiowa County | 13.7 | Very Low |
| 62 | San Juan County | 11 | Very Low |
| 63 | Hinsdale County | 9 | Very Low |
| 64 | Cheyenne County | 8.1 | 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 Colorado:
Frequently asked questions
What is the highest earthquake risk county in Colorado?
Denver County, CO has the highest earthquake risk in Colorado, with a FEMA National Risk Index score of 91 out of 100 (rated "Relatively Moderate").
What causes earthquake risk in Colorado?
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.