| # | County | Expected annual loss |
|---|---|---|
| 1 | Ada County | $115.6M |
| 2 | Bonneville County | $64.7M |
| 3 | Kootenai County | $45.4M |
| 4 | Canyon County | $36.1M |
| 5 | Bonner County | $35.4M |
| 6 | Bannock County | $31.3M |
| 7 | Idaho County | $31.2M |
| 8 | Blaine County | $28.2M |
| 9 | Bingham County | $23.1M |
| 10 | Madison County | $22.5M |
| 11 | Elmore County | $21.7M |
| 12 | Shoshone County | $20.0M |
| 13 | Valley County | $19.6M |
| 14 | Jefferson County | $17.2M |
| 15 | Twin Falls County | $16.6M |
| 16 | Fremont County | $16.1M |
| 17 | Boise County | $16.0M |
| 18 | Cassia County | $15.6M |
| 19 | Nez Perce County | $15.1M |
| 20 | Latah County | $13.3M |
| 21 | Teton County | $12.1M |
| 22 | Lemhi County | $11.4M |
| 23 | Gem County | $11.2M |
| 24 | Custer County | $10.6M |
| 25 | Clearwater County | $10.2M |
Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Expected Annual Loss from Natural Hazards in Idaho”, https://gismap.land/rankings/idaho/highest-expected-loss-counties. Figures from FEMA National Risk Index (December 2025).
More Idaho rankings
Richest citiesMost expensive homesMost affordable homesHighest rentMost educatedHighest poverty rateMost densely populatedLargest by populationYoungestOldest by median ageFastest-growingFastest-shrinkingFastest-growing since 2010WarmestColdestSnowiestWettestDriestHighest hazard risk countiesLowest hazard risk countiesHighest radon potentialWorst air qualityCleanest airWorst drought