Idaho natural disaster risk
Idaho ranks #8 of 51 from the lowest population-weighted county-score mean in our state comparison. Its highest hazard-score means are wildfire, winter weather, earthquake.
RelocateMath computes these state means by weighting FEMA county scores by population. A mean of county percentiles is not a national state percentile or an official FEMA state rating.
The vertical line marks county-score scale midpoint (50).
Find your county's risk in Idaho
All 44 county rows with a FEMA score are available below, initially ordered by population.
| County | Population | Risk score | FEMA rating |
|---|---|---|---|
| Ada County | 518,935 | 87.8 | Relatively Moderate |
| Canyon County | 250,790 | 71.7 | Relatively Low |
| Kootenai County | 181,996 | 79.0 | Relatively Low |
| Bonneville County | 129,523 | 82.4 | Relatively Moderate |
| Twin Falls County | 93,734 | 46.9 | Relatively Low |
| Bannock County | 89,454 | 66.9 | Relatively Low |
| Madison County | 54,618 | 58.6 | Relatively Low |
| Bonner County | 51,049 | 77.3 | Relatively Low |
| Bingham County | 49,664 | 60.1 | Relatively Low |
| Nez Perce County | 42,697 | 33.0 | Very Low |
| Latah County | 41,049 | 33.3 | Very Low |
| Jefferson County | 33,154 | 40.1 | Very Low |
| Elmore County | 29,321 | 52.0 | Relatively Low |
| Payette County | 26,771 | 17.1 | Very Low |
| Cassia County | 25,483 | 43.6 | Relatively Low |
| Jerome County | 25,173 | 21.5 | Very Low |
| Blaine County | 24,951 | 65.4 | Relatively Low |
| Minidoka County | 22,208 | 20.5 | Very Low |
| Gem County | 20,614 | 34.4 | Very Low |
| Idaho County | 17,432 | 78.4 | Relatively Low |
| Gooding County | 15,931 | 25.4 | Very Low |
| Franklin County | 15,056 | 7.6 | Very Low |
| Fremont County | 13,943 | 38.3 | Very Low |
| Shoshone County | 13,785 | 62.8 | Relatively Low |
| Boundary County | 13,172 | 26.1 | Very Low |
| Owyhee County | 12,503 | 44.1 | Relatively Low |
| Teton County | 12,425 | 29.5 | Very Low |
| Valley County | 12,389 | 55.6 | Relatively Low |
| Washington County | 11,142 | 30.3 | Very Low |
| Benewah County | 10,142 | 19.9 | Very Low |
| Clearwater County | 9,012 | 46.9 | Relatively Low |
| Boise County | 8,273 | 48.9 | Relatively Low |
| Lemhi County | 8,249 | 41.4 | Very Low |
| Power County | 8,133 | 16.9 | Very Low |
| Caribou County | 7,162 | 7.2 | Very Low |
| Bear Lake County | 6,650 | 6.6 | Very Low |
| Lincoln County | 5,358 | 9.1 | Very Low |
| Oneida County | 4,768 | 1.4 | Very Low |
| Adams County | 4,744 | 39.6 | Very Low |
| Custer County | 4,470 | 52.4 | Relatively Low |
| Lewis County | 3,682 | 3.1 | Very Low |
| Butte County | 2,684 | 4.4 | Very Low |
| Camas County | 1,124 | 6.0 | Very Low |
| Clark County | 849 | 0.8 | Very Low |
The county rows show FEMA's own county percentile scores and rating categories; the state figures above are our weighted means. County data cannot establish a property's safety. Expected loss is modeled annual loss per resident, not a premium quote. The insurance figure is what owners with a mortgage reported paying in 2024 (Census American Community Survey), not a current quote. For a specific home, check the address on FEMA's flood map and get insurance quotes before you commit. Our guide explains how to check natural disaster risk before you move.
Lowest FEMA county risk scores in Idaho
- Payette County 17.1
- Minidoka County 20.5
- Jerome County 21.5
- Nez Perce County 33.0
- Latah County 33.3
- Gem County 34.4
- Jefferson County 40.1
- Cassia County 43.6
Cities in Idaho
- Boise, ID county-score mean 80.5
Frequently asked questions
Is Idaho safe from natural disasters?
Idaho's population-weighted county-score mean is 65.7 out of 100 (high county-score mean), #8 of 51 from the lowest mean in our state comparison. A state average cannot show whether an individual home is safe. No residents in this dataset live in counties FEMA rates relatively high or very high.
What natural disasters happen in Idaho?
The highest population-weighted county hazard-score means in Idaho are wildfire, winter weather, earthquake (means 90, 83, 76 on the 0–100 county-score scale). These are not national state percentiles.
Which counties have the lowest modeled risk scores in Idaho?
Among counties with at least 20,000 people, the lowest FEMA county risk scores are in Payette County, Minidoka County, Jerome County. Conditions vary within each county; check an individual address separately.