Data / Rankings / Traffic fatality rate / Counties in Idaho

Counties in Idaho by traffic fatality rate

Adams County had the highest traffic fatality rate of 44 counties in 2017, at 121.8 per 100,000 people. Teton County had the lowest, at 0 per 100,000 people. The median was 16.9 per 100,000 people and the figure for Idaho was 14.1 per 100,000 people. Source: NHTSA and BEA.

Keep it in a collection in your library.
Highest121.8Adams County
Lowest0Teton County
Median16.944 counties
Idaho14.1History

Map of counties, 2017

Ada County: 6.5 per 100,000 peopleAdams County: 121.8 per 100,000 peopleBannock County: 15.4 per 100,000 peopleBear Lake County: 32.3 per 100,000 peopleBenewah County: 0 per 100,000 peopleBingham County: 17.2 per 100,000 peopleBlaine County: 13 per 100,000 peopleBoise County: 56.7 per 100,000 peopleBonner County: 15.9 per 100,000 peopleBonneville County: 9.5 per 100,000 peopleBoundary County: 17.2 per 100,000 peopleButte County: 78.7 per 100,000 peopleCamas County: 0 per 100,000 peopleCanyon County: 10.3 per 100,000 peopleCaribou County: 14.5 per 100,000 peopleCassia County: 20.9 per 100,000 peopleClark County: 0 per 100,000 peopleClearwater County: 11.7 per 100,000 peopleCuster County: 48.3 per 100,000 peopleElmore County: 43.2 per 100,000 peopleFranklin County: 14.8 per 100,000 peopleFremont County: 15.1 per 100,000 peopleGem County: 11.3 per 100,000 peopleGooding County: 39.5 per 100,000 peopleIdaho County: 49.3 per 100,000 peopleJefferson County: 13.9 per 100,000 peopleJerome County: 42.5 per 100,000 peopleKootenai County: 12 per 100,000 peopleLatah County: 10.3 per 100,000 peopleLemhi County: 12.9 per 100,000 peopleLewis County: 27.3 per 100,000 peopleLincoln County: 38.4 per 100,000 peopleMadison County: 4.1 per 100,000 peopleMinidoka County: 23.8 per 100,000 peopleNez Perce County: 16.9 per 100,000 peopleOneida County: 45.1 per 100,000 peopleOwyhee County: 34.7 per 100,000 peoplePayette County: 16.8 per 100,000 peoplePower County: 25.8 per 100,000 peopleShoshone County: 62.8 per 100,000 peopleTeton County: 0 per 100,000 peopleTwin Falls County: 10.4 per 100,000 peopleValley County: 83.8 per 100,000 peopleWashington County: 19.6 per 100,000 people
  • Under 10
  • 10 to 13
  • 13 to 17
  • 17 to 27
  • 27 to 45
  • 45 and over
per 100,000 people, 2017. Source: Invokely calculation with data from NHTSA, BEA. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2017

Adams County: 121.8 per 100,000 peopleAdams County121.8Valley County: 83.8 per 100,000 peopleValley County83.8Butte County: 78.7 per 100,000 peopleButte County78.7Shoshone County: 62.8 per 100,000 peopleShoshone County62.8Boise County: 56.7 per 100,000 peopleBoise County56.7Idaho County: 49.3 per 100,000 peopleIdaho County49.3Custer County: 48.3 per 100,000 peopleCuster County48.3Oneida County: 45.1 per 100,000 peopleOneida County45.1Elmore County: 43.2 per 100,000 peopleElmore County43.2Jerome County: 42.5 per 100,000 peopleJerome County42.5Gooding County: 39.5 per 100,000 peopleGooding County39.5Lincoln County: 38.4 per 100,000 peopleLincoln County38.4Owyhee County: 34.7 per 100,000 peopleOwyhee County34.7Bear Lake County: 32.3 per 100,000 peopleBear Lake County32.3Lewis County: 27.3 per 100,000 peopleLewis County27.3Power County: 25.8 per 100,000 peoplePower County25.8Minidoka County: 23.8 per 100,000 peopleMinidoka County23.8Cassia County: 20.9 per 100,000 peopleCassia County20.9Washington County: 19.6 per 100,000 peopleWashington County19.6Boundary County: 17.2 per 100,000 peopleBoundary County17.2Bingham County: 17.2 per 100,000 peopleBingham County17.2Nez Perce County: 16.9 per 100,000 peopleNez Perce County16.9Payette County: 16.8 per 100,000 peoplePayette County16.8Bonner County: 15.9 per 100,000 peopleBonner County15.9Bannock County: 15.4 per 100,000 peopleBannock County15.4Fremont County: 15.1 per 100,000 peopleFremont County15.1Franklin County: 14.8 per 100,000 peopleFranklin County14.8Caribou County: 14.5 per 100,000 peopleCaribou County14.5Jefferson County: 13.9 per 100,000 peopleJefferson County13.9Blaine County: 13 per 100,000 peopleBlaine County13Lemhi County: 12.9 per 100,000 peopleLemhi County12.9Kootenai County: 12 per 100,000 peopleKootenai County12Clearwater County: 11.7 per 100,000 peopleClearwater County11.7Gem County: 11.3 per 100,000 peopleGem County11.3Twin Falls County: 10.4 per 100,000 peopleTwin Falls County10.4Canyon County: 10.3 per 100,000 peopleCanyon County10.3Latah County: 10.3 per 100,000 peopleLatah County10.3Bonneville County: 9.5 per 100,000 peopleBonneville County9.5Ada County: 6.5 per 100,000 peopleAda County6.5Madison County: 4.1 per 100,000 peopleMadison County4.1Benewah County: 0 per 100,000 peopleBenewah County0Camas County: 0 per 100,000 peopleCamas County0Clark County: 0 per 100,000 peopleClark County0Teton County: 0 per 100,000 peopleTeton County0Adams County: 121.8 per 100,000 peopleAdams County121.8Valley County: 83.8 per 100,000 peopleValley County83.8Butte County: 78.7 per 100,000 peopleButte County78.7Shoshone County: 62.8 per 100,000 peopleShoshone County62.8Boise County: 56.7 per 100,000 peopleBoise County56.7Idaho County: 49.3 per 100,000 peopleIdaho County49.3Custer County: 48.3 per 100,000 peopleCuster County48.3Oneida County: 45.1 per 100,000 peopleOneida County45.1Elmore County: 43.2 per 100,000 peopleElmore County43.2Jerome County: 42.5 per 100,000 peopleJerome County42.5Gooding County: 39.5 per 100,000 peopleGooding County39.5Lincoln County: 38.4 per 100,000 peopleLincoln County38.4Owyhee County: 34.7 per 100,000 peopleOwyhee County34.7Bear Lake County: 32.3 per 100,000 peopleBear Lake County32.3Lewis County: 27.3 per 100,000 peopleLewis County27.3Power County: 25.8 per 100,000 peoplePower County25.8Minidoka County: 23.8 per 100,000 peopleMinidoka County23.8Cassia County: 20.9 per 100,000 peopleCassia County20.9Washington County: 19.6 per 100,000 peopleWashington County19.6Boundary County: 17.2 per 100,000 peopleBoundary County17.2Bingham County: 17.2 per 100,000 peopleBingham County17.2Nez Perce County: 16.9 per 100,000 peopleNez Perce County16.9Payette County: 16.8 per 100,000 peoplePayette County16.8Bonner County: 15.9 per 100,000 peopleBonner County15.9Bannock County: 15.4 per 100,000 peopleBannock County15.4Fremont County: 15.1 per 100,000 peopleFremont County15.1Franklin County: 14.8 per 100,000 peopleFranklin County14.8Caribou County: 14.5 per 100,000 peopleCaribou County14.5Jefferson County: 13.9 per 100,000 peopleJefferson County13.9Blaine County: 13 per 100,000 peopleBlaine County13Lemhi County: 12.9 per 100,000 peopleLemhi County12.9Kootenai County: 12 per 100,000 peopleKootenai County12Clearwater County: 11.7 per 100,000 peopleClearwater County11.7Gem County: 11.3 per 100,000 peopleGem County11.3Twin Falls County: 10.4 per 100,000 peopleTwin Falls County10.4Canyon County: 10.3 per 100,000 peopleCanyon County10.3Latah County: 10.3 per 100,000 peopleLatah County10.3Bonneville County: 9.5 per 100,000 peopleBonneville County9.5Ada County: 6.5 per 100,000 peopleAda County6.5Madison County: 4.1 per 100,000 peopleMadison County4.1Benewah County: 0 per 100,000 peopleBenewah County0Camas County: 0 per 100,000 peopleCamas County0Clark County: 0 per 100,000 peopleClark County0Teton County: 0 per 100,000 peopleTeton County0
per 100,000 people. Source: Invokely calculation with data from NHTSA, BEA. Retrieved 2026-10-12.

Full ranking

RankCounties2017
per 100,000 people		Change on 2016
1Adams County121.8+96.3 pts
2Valley County83.8+83.8 pts
3Butte County78.7+39.3 pts
4Shoshone County62.8-16.4 pts
5Boise County56.7+12.8 pts
6Idaho County49.3-37.6 pts
7Custer County48.3-49.4 pts
8Oneida County45.1+45.1 pts
9Elmore County43.2+9.8 pts
10Jerome County42.5-26.4 pts
11Gooding County39.5+13.1 pts
12Lincoln County38.4-19.6 pts
13Owyhee County34.7+25.8 pts
14Bear Lake County32.3-0.6 pts
15Lewis County27.3-0 pts
16Power County25.8+0.1 pts
17Minidoka County23.8+4.6 pts
18Cassia County20.9-33.9 pts
19Washington County19.6-0.1 pts
20Boundary County17.2+8.5 pts
21Bingham County17.2-4.6 pts
22Nez Perce County16.9+4.7 pts
23Payette County16.8-0.3 pts
24Bonner County15.9-0.5 pts
25Bannock County15.4+3.5 pts
26Fremont County15.1+7.4 pts
27Franklin County14.8-22.6 pts
28Caribou County14.5-0.2 pts
29Jefferson County13.9+3.2 pts
30Blaine County13+8.6 pts
31Lemhi County12.9-0.2 pts
32Kootenai County12+2.2 pts
33Clearwater County11.7-46.5 pts
34Gem County11.3+5.5 pts
35Twin Falls County10.4-10.8 pts
36Canyon County10.3-3.1 pts
37Latah County10.3+2.4 pts
38Bonneville County9.5-1.1 pts
39Ada County6.5+1.2 pts
40Madison County4.1-0.1 pts
41Benewah County0-11 pts
41Camas County0-95.5 pts
41Clark County0-358.9 pts
41Teton County0-9.3 pts

Other periods

About this ranking

Traffic fatalities (NHTSA FARS) per 100,000 residents in the same year and place.

Deaths are counted where the crash happened and divided by the resident population, so counties with busy highways and few residents can show very high rates. Differs from the WHO road traffic death rate (road_traffic_death_rate).

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

Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Retrieved 2026-10-12.

Citation styles

Invokely calculated this figure from the publishers' data, so Invokely is the author and the publishers of the inputs are named.

APA 7

Invokely. (n.d.). NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents (Counties in Idaho by traffic fatality rate, 2017) [Data set]. Calculated from data by NHTSA and BEA. Retrieved October 12, 2026, from https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k

MLA 9

NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents, Counties in Idaho by traffic fatality rate, 2017. Calculated from data by NHTSA and BEA. Invokely, https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Accessed 12 Oct. 2026.

Chicago (author-date)

Invokely. n.d. NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. Counties in Idaho by traffic fatality rate, 2017. Dataset. Calculated from data by NHTSA and BEA. Accessed October 12, 2026. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k.

Harvard

Invokely (no date) NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents, Counties in Idaho by traffic fatality rate, 2017 [Dataset]. Calculated from data by NHTSA and BEA. Available at: https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k (Accessed: 12 October 2026).

BibTeX
@misc{invokely_counties_in_idaho_by_2017,
  author = {{Invokely}},
  title = {{NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents: Counties in Idaho by traffic fatality rate, 2017}},
  howpublished = {Data set},
  url = {https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k},
  urldate = {2026-10-12},
  note = {Calculated from data by NHTSA and BEA. Accessed via Invokely, https://invokely.ai/rankings/traffic-fatality-rate/idaho-counties?period=2017. Publisher attribution: Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology\#traffic\_fatality\_rate\_per\_100k. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - Invokely
TI  - NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents: Counties in Idaho by traffic fatality rate, 2017
PB  - Invokely
DB  - Invokely
UR  - https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k
L2  - https://invokely.ai/rankings/traffic-fatality-rate/idaho-counties?period=2017
Y2  - 2026/10/12
N1  - Calculated from data by NHTSA and BEA.
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatality-rate/idaho-counties?period=2017.
N1  - Publisher attribution: Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Retrieved 2026-10-12.
ER  -
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Rank Counties in Idaho by traffic fatality rate using official data, and cite the source.
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Questions

Which county has the highest traffic fatality rate?

Adams County, with 121.8 per 100,000 people in 2017, according to NHTSA and BEA.

Which county has the lowest traffic fatality rate?

Teton County, with 0 per 100,000 people in 2017.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Invokely, NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. Retrieved 2026-10-12.

Traffic fatality rate: other rankings

Counties in Idaho: more rankings