Natural disaster risk in Wyoming, by county
All 23 counties in Wyoming, ranked by FEMA's National Risk Index composite risk score, with each one's highest-rated hazard. Other states
At a glance
Highest overall risk: Laramie County (relatively low, score 76.7). Lowest: Niobrara County (very low, score 3.3).
Top hazards in Wyoming
| Hazard | Counties rated relatively high or very high | Average score |
|---|---|---|
| Winter weather | 8 of 23 | 68.1 |
| Lightning | 6 of 23 | 56.5 |
| Avalanche | 5 of 23 | 46.3 |
| Landslide | 1 of 23 | 74.2 |
| Cold wave | 1 of 23 | 56.4 |
All counties, highest risk first
| # | County | Overall risk | Highest-rated hazard |
|---|---|---|---|
| 1 | Laramie County | Relatively low 76.7 | Winter weather (very high) |
| 2 | Teton County | Relatively low 70.6 | Avalanche (very high) |
| 3 | Natrona County | Relatively low 68.9 | Winter weather (very high) |
| 4 | Sheridan County | Relatively low 65.2 | Winter weather (relatively high) |
| 5 | Fremont County | Relatively low 59.7 | Lightning (relatively high) |
| 6 | Park County | Relatively low 57.7 | Avalanche (relatively high) |
| 7 | Campbell County | Relatively low 56.1 | Hail (relatively high) |
| 8 | Lincoln County | Relatively low 51.9 | Avalanche (very high) |
| 9 | Albany County | Relatively low 48.5 | Winter weather (relatively high) |
| 10 | Carbon County | Very low 42.7 | Avalanche (relatively high) |
| 11 | Converse County | Very low 31.4 | Wildfire (relatively moderate) |
| 12 | Big Horn County | Very low 31.1 | Landslide (relatively high) |
| 13 | Sweetwater County | Very low 30.6 | Winter weather (relatively high) |
| 14 | Goshen County | Very low 28.5 | Hail (relatively moderate) |
| 15 | Platte County | Very low 25.7 | Winter weather (relatively moderate) |
| 16 | Washakie County | Very low 24.4 | Landslide (relatively moderate) |
| 17 | Sublette County | Very low 21.6 | Avalanche (relatively high) |
| 18 | Johnson County | Very low 19.3 | Winter weather (relatively moderate) |
| 19 | Uinta County | Very low 16.7 | Winter weather (relatively high) |
| 20 | Crook County | Very low 16.1 | Hail (relatively moderate) |
| 21 | Hot Springs County | Very low 16.1 | Landslide (relatively moderate) |
| 22 | Weston County | Very low 7.9 | Hail (relatively moderate) |
| 23 | Niobrara County | Very low 3.3 | Wildfire (relatively low) |
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
Which county in Wyoming has the highest natural disaster risk?
Laramie County has the highest composite risk score in Wyoming in FEMA's National Risk Index: 76.7, rated relatively low.
Which county in Wyoming has the lowest natural disaster risk?
Niobrara County has the lowest composite risk score in Wyoming: 3.3, rated very low. A low score means lower modelled risk compared with other US counties, not no risk.
What natural disasters is Wyoming most at risk from?
Across Wyoming, the hazards rated highest in the most counties are winter weather, lightning, avalanche, according to FEMA's National Risk Index. Each county page lists all 18 hazards.
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