Idaho natural disaster risk
Ratings for all 44 counties, the federal disaster record and flood insurance across the state.
Idaho has had 34 major federal disaster declarations for natural events since 1953. FEMA expects about $767 million a year in losses from natural hazards across the state. Inland flooding is the costliest hazard in 33 of its 44 counties, followed by wildfire in 9. None is rated Very High overall. About 0.5% of homes carry federal flood insurance, and the program has paid $10.3 million on 1,086 claims here since 1978.
Lowest risk (50,000+ people)
Top hazards
Recent federal declarations
All states ›Largest counties
Ada County
494,805 people
Inland floodingCanyon County
230,937 people
Inland floodingKootenai County
171,251 people
Inland floodingBonneville County
123,895 people
Inland floodingTwin Falls County
89,972 people
Inland floodingBannock County
86,991 people
WildfireMadison County
52,900 people
Inland floodingBingham County
47,925 people
Inland floodingBonner County
46,954 people
Inland floodingNez Perce County
42,062 people
Inland floodingLatah County
39,513 people
Inland floodingJefferson County
30,825 people
Inland floodingAll 44 counties
| Name | People | Overall risk | Top hazard | Declarations | Homes insured |
|---|---|---|---|---|---|
| Ada County | 494,805 | Inland flooding | 4 | 0.9% | |
| Adams County | 4,357 | Wildfire | 7 | 0.3% | |
| Bannock County | 86,991 | Wildfire | 3 | 0.3% | |
| Bear Lake County | 6,369 | Inland flooding | 2 | 0% | |
| Benewah County | 9,494 | Inland flooding | 14 | 0.9% | |
| Bingham County | 47,925 | Inland flooding | 5 | 0.5% | |
| Blaine County | 24,251 | Inland flooding | 8 | 2.8% | |
| Boise County | 7,582 | Wildfire | 5 | 0.4% | |
| Bonner County | 46,954 | Inland flooding | 16 | 0.5% | |
| Bonneville County | 123,895 | Inland flooding | 5 | 0.2% | |
| Boundary County | 12,050 | Inland flooding | 10 | 0.2% | |
| Butte County | 2,574 | Inland flooding | 4 | 0.4% | |
| Camas County | 1,059 | Avalanche | 6 | 0.5% | |
| Canyon County | 230,937 | Inland flooding | 2 | 0.4% | |
| Caribou County | 7,026 | Inland flooding | 3 | 0.1% | |
| Cassia County | 24,356 | Inland flooding | 3 | 0.2% | |
| Clark County | 783 | Inland flooding | 2 | 0% | |
| Clearwater County | 8,728 | Inland flooding | 13 | 0.2% | |
| Custer County | 4,271 | Inland flooding | 5 | 0.4% | |
| Elmore County | 28,530 | Wildfire | 9 | 0.9% | |
| Franklin County | 14,177 | Inland flooding | 2 | 0.1% | |
| Fremont County | 13,341 | Inland flooding | 3 | 0.2% | |
| Gem County | 19,098 | Wildfire | 5 | 0.3% | |
| Gooding County | 15,584 | Wildfire | 5 | 0.6% | |
| Idaho County | 16,440 | Wildfire | 16 | 0.1% | |
| Jefferson County | 30,825 | Inland flooding | 4 | 0.3% | |
| Jerome County | 24,208 | Inland flooding | 4 | 0% | |
| Kootenai County | 171,251 | Inland flooding | 16 | 0.3% | |
| Latah County | 39,513 | Inland flooding | 14 | 0.9% | |
| Lemhi County | 7,951 | Inland flooding | 3 | 0.6% | |
| Lewis County | 3,530 | Inland flooding | 10 | 0.9% | |
| Lincoln County | 5,117 | Wildfire | 5 | 0.2% | |
| Madison County | 52,900 | Inland flooding | 3 | 0.2% | |
| Minidoka County | 21,577 | Inland flooding | 3 | 0.1% | |
| Nez Perce County | 42,062 | Inland flooding | 13 | 0.2% | |
| Oneida County | 4,563 | Inland flooding | 1 | 0% | |
| Owyhee County | 11,869 | Inland flooding | 4 | 0.1% | |
| Payette County | 25,363 | Inland flooding | 4 | 0.2% | |
| Power County | 7,876 | Cold wave | 3 | 0% | |
| Shoshone County | 13,154 | Inland flooding | 14 | 1.6% | |
| Teton County | 11,613 | Inland flooding | 1 | 1% | |
| Twin Falls County | 89,972 | Inland flooding | 2 | 0.2% | |
| Valley County | 11,617 | Wildfire | 10 | 0.2% | |
| Washington County | 10,478 | Inland flooding | 8 | 1.1% |
Linked names have a full page. Overall risk from the FEMA National Risk Index (December 2025); declarations are federal disaster and emergency declarations for natural events since 1953 (OpenFEMA); homes insured is the share with NFIP flood policies.