Editorial
Most disaster-prone counties in Idaho
Idaho has 350 county-level FEMA disaster declarations across 44 counties. The dominant hazard type is biological. Idaho County leads with 17 declarations, followed by Bonner County and Kootenai County.
This ranking shows every county in Idaho ordered by how many times FEMA has issued a disaster declaration affecting it. Counties near coastlines, river systems, or wildfire corridors tend to appear at the top because the same geographic exposure produces recurring events across decades.
Each county links to a full disaster history page with the complete declaration timeline, hazard type breakdown, decade trends, and whatever FEMA spending data is available. For a national view, see the most disaster-prone counties in America page.
Idaho ranking
All counties by FEMA declaration count
| # | County | Declarations | Top hazard | First year | Latest year |
|---|---|---|---|---|---|
| 1 | Idaho County | 17 | Fire | 1964 | 2024 |
| 2 | Bonner County | 16 | Severe Storm | 1967 | 2025 |
| 3 | Kootenai County | 16 | Severe Storm | 1964 | 2021 |
| 4 | Shoshone County | 15 | Flood | 1964 | 2024 |
| 5 | Benewah County | 14 | Severe Storm | 1964 | 2021 |
| 6 | Latah County | 14 | Flood | 1964 | 2024 |
| 7 | Clearwater County | 13 | Flood | 1964 | 2020 |
| 8 | Nez Perce County | 13 | Fire | 1964 | 2024 |
| 9 | Valley County | 12 | Fire | 1997 | 2022 |
| 10 | Boundary County | 11 | Severe Storm | 1967 | 2020 |
| 11 | Elmore County | 11 | Fire | 1964 | 2020 |
| 12 | Lewis County | 11 | Fire | 1964 | 2024 |
| 13 | Blaine County | 10 | Fire | 1964 | 2022 |
| 14 | Adams County | 9 | Biological | 1974 | 2022 |
| 15 | Washington County | 9 | Flood | 1964 | 2020 |
| 16 | Camas County | 8 | Biological | 1964 | 2020 |
| 17 | Bingham County | 7 | Biological | 1976 | 2020 |
| 18 | Boise County | 7 | Biological | 1964 | 2020 |
| 19 | Bonneville County | 7 | Biological | 1964 | 2020 |
| 20 | Custer County | 7 | Biological | 1983 | 2020 |
| 21 | Gem County | 7 | Biological | 1964 | 2022 |
| 22 | Gooding County | 7 | Flood | 1964 | 2020 |
| 23 | Lincoln County | 7 | Biological | 1964 | 2020 |
| 24 | Ada County | 6 | Biological | 1964 | 2020 |
| 25 | Butte County | 6 | Biological | 1964 | 2020 |
| 26 | Jefferson County | 6 | Biological | 1976 | 2020 |
| 27 | Jerome County | 6 | Biological | 1964 | 2020 |
| 28 | Owyhee County | 6 | Biological | 1964 | 2020 |
| 29 | Payette County | 6 | Biological | 1964 | 2020 |
| 30 | Bannock County | 5 | Biological | 1964 | 2020 |
| 31 | Caribou County | 5 | Biological | 1964 | 2020 |
| 32 | Cassia County | 5 | Biological | 1964 | 2020 |
| 33 | Fremont County | 5 | Biological | 1976 | 2020 |
| 34 | Lemhi County | 5 | Biological | 1984 | 2020 |
| 35 | Madison County | 5 | Biological | 1976 | 2020 |
| 36 | Minidoka County | 5 | Biological | 1964 | 2020 |
| 37 | Power County | 5 | Biological | 1964 | 2020 |
| 38 | Bear Lake County | 4 | Biological | 1977 | 2020 |
| 39 | Canyon County | 4 | Biological | 2005 | 2020 |
| 40 | Clark County | 4 | Biological | 2005 | 2020 |
| 41 | Franklin County | 4 | Biological | 2005 | 2020 |
| 42 | Twin Falls County | 4 | Biological | 2005 | 2020 |
| 43 | Oneida County | 3 | Biological | 2005 | 2020 |
| 44 | Teton County | 3 | Biological | 2005 | 2020 |