Landslide Risk in Wyoming
All Wyoming counties ranked by FEMA National Risk Index landslide score
Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 23 of 23 Wyoming counties in FEMA's National Risk Index. Big Horn County carries the state's highest landslide score at 97.9, with $493K in expected annual landslide losses.
1 Wyoming county is rated High or Very High for landslide, and expected annual losses from landslide total roughly $2M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Landslide
| # | County | Landslide Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Big Horn County | High | 2.07 / yr | $493K | |
| 2 | Park County | Medium | 7.03 / yr | $333K | |
| 3 | Fremont County | Medium | 7.42 / yr | $265K | |
| 4 | Lincoln County | Medium | 4.79 / yr | $144K | |
| 5 | Hot Springs County | Medium | 3.05 / yr | $95K | |
| 6 | Teton County | Medium | 6.23 / yr | $139K | |
| 7 | Sublette County | Medium | 4.46 / yr | $105K | |
| 8 | Washakie County | Medium | 2.72 / yr | $69K | |
| 9 | Natrona County | Medium | 3.25 / yr | $84K | |
| 10 | Sweetwater County | Medium | 2.61 / yr | $71K | |
| 11 | Carbon County | Medium | 3.31 / yr | $51K | |
| 12 | Albany County | Medium | 1.24 / yr | $53K | |
| 13 | Uinta County | Low | 0.89 / yr | $19K | |
| 14 | Sheridan County | Low | 4.33 / yr | $11K | |
| 15 | Johnson County | Low | 7.93 / yr | $8K | |
| 16 | Campbell County | Low | 3.71 / yr | $7K | |
| 17 | Converse County | Very Low | 2.94 / yr | $3K | |
| 18 | Crook County | Very Low | 0.72 / yr | $1K | |
| 19 | Weston County | Very Low | 1.02 / yr | $1K | |
| 20 | Platte County | Very Low | 1.30 / yr | $556 | |
| 21 | Laramie County | Very Low | 0.75 / yr | $914 | |
| 22 | Niobrara County | Very Low | 1.37 / yr | $328 | |
| 23 | Goshen County | Very Low | 0.57 / yr | $124 |
23 Wyoming counties with measurable landslide risk. See the national landslide ranking or all Wyoming counties by overall risk.
Frequently Asked Questions
Which Wyoming county has the highest landslide risk?
Big Horn County has the highest FEMA landslide risk score in Wyoming at 97.9 (High), with $493K in expected annual losses and about 2.07 events per year.
How many Wyoming counties face significant landslide risk?
23 Wyoming counties record measurable landslide risk in FEMA's National Risk Index; 1 of them are rated High or Very High.