| # | County | Risk Index score |
|---|---|---|
| 1 | Flathead County | 86.5 |
| 2 | Yellowstone County | 83.6 |
| 3 | Cascade County | 83.1 |
| 4 | Gallatin County | 81.0 |
| 5 | Ravalli County | 78.5 |
| 6 | Missoula County | 77.0 |
| 7 | Lewis and Clark County | 71.2 |
| 8 | Lake County | 67.7 |
| 9 | Park County | 66.3 |
| 10 | Lincoln County | 64.3 |
| 11 | Dawson County | 63.8 |
| 12 | Carbon County | 59.8 |
| 13 | Big Horn County | 57.2 |
| 14 | Roosevelt County | 54.5 |
| 15 | Richland County | 52.7 |
| 16 | Glacier County | 51.5 |
| 17 | Hill County | 50.4 |
| 18 | Rosebud County | 49.7 |
| 19 | Sanders County | 47.4 |
| 20 | Blaine County | 45.9 |
| 21 | Fergus County | 45.1 |
| 22 | Beaverhead County | 42.9 |
| 23 | Custer County | 42.1 |
| 24 | Madison County | 41.0 |
| 25 | Chouteau County | 39.5 |
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 Natural Hazard Risk in Montana”, https://gismap.land/rankings/montana/highest-risk-counties. Figures from FEMA National Risk Index (December 2025).
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