Data / Rankings / National Risk Index score (FEMA) / Counties in Idaho

Counties in Idaho by national Risk Index score (FEMA), 2025

Ada County had the highest national Risk Index score (FEMA) of 44 counties in 2025, at 87.8. Clark County had the lowest, at 0.8. The median was 38.9. Source: the Federal Emergency Management Agency.

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Highest87.8Ada County
Lowest0.8Clark County
Median38.944 counties

Map of counties, 2025

Ada County: 87.8 indexAdams County: 39.6 indexBannock County: 66.9 indexBear Lake County: 6.6 indexBenewah County: 19.9 indexBingham County: 60.2 indexBlaine County: 65.4 indexBoise County: 48.9 indexBonner County: 77.3 indexBonneville County: 82.4 indexBoundary County: 26.1 indexButte County: 4.4 indexCamas County: 6 indexCanyon County: 71.7 indexCaribou County: 7.2 indexCassia County: 43.6 indexClark County: 0.8 indexClearwater County: 46.9 indexCuster County: 52.4 indexElmore County: 52 indexFranklin County: 7.6 indexFremont County: 38.3 indexGem County: 34.5 indexGooding County: 25.5 indexIdaho County: 78.4 indexJefferson County: 40.1 indexJerome County: 21.5 indexKootenai County: 79 indexLatah County: 33.3 indexLemhi County: 41.4 indexLewis County: 3.1 indexLincoln County: 9.1 indexMadison County: 58.6 indexMinidoka County: 20.5 indexNez Perce County: 33 indexOneida County: 1.4 indexOwyhee County: 44.1 indexPayette County: 17.1 indexPower County: 16.9 indexShoshone County: 62.9 indexTeton County: 29.5 indexTwin Falls County: 47 indexValley County: 55.6 indexWashington County: 30.3 index
  • Under 7.9
  • 7.9 to 26
  • 26 to 39
  • 39 to 48
  • 48 to 65
  • 65 and over
index, 2025. Source: FEMA National Risk Index, National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2025

Ada County: 87.8 indexAda County87.8Bonneville County: 82.4 indexBonneville County82.4Kootenai County: 79 indexKootenai County79Idaho County: 78.4 indexIdaho County78.4Bonner County: 77.3 indexBonner County77.3Canyon County: 71.7 indexCanyon County71.7Bannock County: 66.9 indexBannock County66.9Blaine County: 65.4 indexBlaine County65.4Shoshone County: 62.9 indexShoshone County62.9Bingham County: 60.2 indexBingham County60.2Madison County: 58.6 indexMadison County58.6Valley County: 55.6 indexValley County55.6Custer County: 52.4 indexCuster County52.4Elmore County: 52 indexElmore County52Boise County: 48.9 indexBoise County48.9Twin Falls County: 47 indexTwin Falls County47Clearwater County: 46.9 indexClearwater County46.9Owyhee County: 44.1 indexOwyhee County44.1Cassia County: 43.6 indexCassia County43.6Lemhi County: 41.4 indexLemhi County41.4Jefferson County: 40.1 indexJefferson County40.1Adams County: 39.6 indexAdams County39.6Fremont County: 38.3 indexFremont County38.3Gem County: 34.5 indexGem County34.5Latah County: 33.3 indexLatah County33.3Nez Perce County: 33 indexNez Perce County33Washington County: 30.3 indexWashington County30.3Teton County: 29.5 indexTeton County29.5Boundary County: 26.1 indexBoundary County26.1Gooding County: 25.5 indexGooding County25.5Jerome County: 21.5 indexJerome County21.5Minidoka County: 20.5 indexMinidoka County20.5Benewah County: 19.9 indexBenewah County19.9Payette County: 17.1 indexPayette County17.1Power County: 16.9 indexPower County16.9Lincoln County: 9.1 indexLincoln County9.1Franklin County: 7.6 indexFranklin County7.6Caribou County: 7.2 indexCaribou County7.2Bear Lake County: 6.6 indexBear Lake County6.6Camas County: 6 indexCamas County6Butte County: 4.4 indexButte County4.4Lewis County: 3.1 indexLewis County3.1Oneida County: 1.4 indexOneida County1.4Clark County: 0.8 indexClark County0.8Ada County: 87.8 indexAda County87.8Bonneville County: 82.4 indexBonneville County82.4Kootenai County: 79 indexKootenai County79Idaho County: 78.4 indexIdaho County78.4Bonner County: 77.3 indexBonner County77.3Canyon County: 71.7 indexCanyon County71.7Bannock County: 66.9 indexBannock County66.9Blaine County: 65.4 indexBlaine County65.4Shoshone County: 62.9 indexShoshone County62.9Bingham County: 60.2 indexBingham County60.2Madison County: 58.6 indexMadison County58.6Valley County: 55.6 indexValley County55.6Custer County: 52.4 indexCuster County52.4Elmore County: 52 indexElmore County52Boise County: 48.9 indexBoise County48.9Twin Falls County: 47 indexTwin Falls County47Clearwater County: 46.9 indexClearwater County46.9Owyhee County: 44.1 indexOwyhee County44.1Cassia County: 43.6 indexCassia County43.6Lemhi County: 41.4 indexLemhi County41.4Jefferson County: 40.1 indexJefferson County40.1Adams County: 39.6 indexAdams County39.6Fremont County: 38.3 indexFremont County38.3Gem County: 34.5 indexGem County34.5Latah County: 33.3 indexLatah County33.3Nez Perce County: 33 indexNez Perce County33Washington County: 30.3 indexWashington County30.3Teton County: 29.5 indexTeton County29.5Boundary County: 26.1 indexBoundary County26.1Gooding County: 25.5 indexGooding County25.5Jerome County: 21.5 indexJerome County21.5Minidoka County: 20.5 indexMinidoka County20.5Benewah County: 19.9 indexBenewah County19.9Payette County: 17.1 indexPayette County17.1Power County: 16.9 indexPower County16.9Lincoln County: 9.1 indexLincoln County9.1Franklin County: 7.6 indexFranklin County7.6Caribou County: 7.2 indexCaribou County7.2Bear Lake County: 6.6 indexBear Lake County6.6Camas County: 6 indexCamas County6Butte County: 4.4 indexButte County4.4Lewis County: 3.1 indexLewis County3.1Oneida County: 1.4 indexOneida County1.4Clark County: 0.8 indexClark County0.8
index. Source: FEMA National Risk Index, National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Retrieved 2026-10-12.

Full ranking

RankCounties2025
index
1Ada County87.8
2Bonneville County82.4
3Kootenai County79
4Idaho County78.4
5Bonner County77.3
6Canyon County71.7
7Bannock County66.9
8Blaine County65.4
9Shoshone County62.9
10Bingham County60.2
11Madison County58.6
12Valley County55.6
13Custer County52.4
14Elmore County52
15Boise County48.9
16Twin Falls County47
17Clearwater County46.9
18Owyhee County44.1
19Cassia County43.6
20Lemhi County41.4
21Jefferson County40.1
22Adams County39.6
23Fremont County38.3
24Gem County34.5
25Latah County33.3
26Nez Perce County33
27Washington County30.3
28Teton County29.5
29Boundary County26.1
30Gooding County25.5
31Jerome County21.5
32Minidoka County20.5
33Benewah County19.9
34Payette County17.1
35Power County16.9
36Lincoln County9.1
37Franklin County7.6
38Caribou County7.2
39Bear Lake County6.6
40Camas County6
41Butte County4.4
42Lewis County3.1
43Oneida County1.4
44Clark County0.8

About this ranking

FEMA's composite natural hazard risk score for a US county, from 0 to 100: the county's national percentile rank among all counties for risk, which combines expected annual losses from 18 natural hazards with social vulnerability and community resilience. Higher means more risk.

The period is the year of the National Risk Index edition (the December 2025 edition is 2025), not a year of events. FEMA rebuilds the index with new data and methods in each edition, so values from different editions are not a time series. The index is meant for nationwide comparison and planning, not as a local risk assessment.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

Federal Emergency Management Agency. (2025). National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE) (Counties in Idaho by national Risk Index score (FEMA), 2025) [Data set]. Retrieved October 12, 2026, from https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355

MLA 9

National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE), Counties in Idaho by national Risk Index score (FEMA), 2025. Federal Emergency Management Agency, 16 Dec. 2025, https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Invokely, https://invokely.ai/rankings/national-risk-index-score/idaho-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

Federal Emergency Management Agency. 2025. National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Counties in Idaho by national Risk Index score (FEMA), 2025. Dataset. Accessed October 12, 2026. https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Also distributed by Invokely, https://invokely.ai/rankings/national-risk-index-score/idaho-counties.

Harvard

Federal Emergency Management Agency (2025) National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE), Counties in Idaho by national Risk Index score (FEMA), 2025 [Dataset]. Available at: https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355, via Invokely: https://invokely.ai/rankings/national-risk-index-score/idaho-counties (Accessed: 12 October 2026).

BibTeX
@misc{federal_counties_in_idaho_by_2025,
  author = {{Federal Emergency Management Agency}},
  title = {{National Risk Index Counties, National Risk Index Score Composite (RISK\_SCORE): Counties in Idaho by national Risk Index score (FEMA), 2025}},
  year = {2025},
  howpublished = {Data set},
  url = {https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/national-risk-index-score/idaho-counties. Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK\_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).},
}
RIS
TY  - DATA
AU  - Federal Emergency Management Agency
TI  - National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE): Counties in Idaho by national Risk Index score (FEMA), 2025
PY  - 2025
DA  - 2025/12/16
PB  - Federal Emergency Management Agency
DB  - Invokely
UR  - https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
L2  - https://invokely.ai/rankings/national-risk-index-score/idaho-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/national-risk-index-score/idaho-counties.
N1  - Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
ER  -
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Rank Counties in Idaho by national Risk Index score (FEMA) using official data, and cite the source.
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Questions

Which county has the highest national Risk Index score (FEMA)?

Ada County, with 87.8 in 2025, according to the Federal Emergency Management Agency.

Which county has the lowest national Risk Index score (FEMA)?

Clark County, with 0.8 in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Federal Emergency Management Agency, National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Retrieved 2026-10-12.

National Risk Index score (FEMA): other rankings

Counties in Idaho: more rankings