Data / Rankings / Traffic fatality rate / Counties in Idaho

Counties in Idaho by traffic fatality rate

Clark County had the highest traffic fatality rate of 44 counties in 2018, at 124.2 per 100,000 people. Custer County had the lowest, at 0 per 100,000 people. The median was 15.5 per 100,000 people and the figure for Idaho was 13.2 per 100,000 people. Source: NHTSA and BEA.

Keep it in a collection in your library.
Highest124.2Clark County
Lowest0Custer County
Median15.544 counties
Idaho13.2History

Map of counties, 2018

Ada County: 6.6 per 100,000 peopleAdams County: 71.7 per 100,000 peopleBannock County: 9.4 per 100,000 peopleBear Lake County: 16.1 per 100,000 peopleBenewah County: 53.7 per 100,000 peopleBingham County: 15 per 100,000 peopleBlaine County: 8.5 per 100,000 peopleBoise County: 81.9 per 100,000 peopleBonner County: 17.7 per 100,000 peopleBonneville County: 9.3 per 100,000 peopleBoundary County: 8.6 per 100,000 peopleButte County: 0 per 100,000 peopleCamas County: 0 per 100,000 peopleCanyon County: 12.7 per 100,000 peopleCaribou County: 57.7 per 100,000 peopleCassia County: 4.1 per 100,000 peopleClark County: 124.2 per 100,000 peopleClearwater County: 0 per 100,000 peopleCuster County: 0 per 100,000 peopleElmore County: 24.7 per 100,000 peopleFranklin County: 14.5 per 100,000 peopleFremont County: 45.1 per 100,000 peopleGem County: 11.1 per 100,000 peopleGooding County: 6.6 per 100,000 peopleIdaho County: 55.3 per 100,000 peopleJefferson County: 13.4 per 100,000 peopleJerome County: 37.8 per 100,000 peopleKootenai County: 11.1 per 100,000 peopleLatah County: 10.3 per 100,000 peopleLemhi County: 25.3 per 100,000 peopleLewis County: 55.8 per 100,000 peopleLincoln County: 96.5 per 100,000 peopleMadison County: 2 per 100,000 peopleMinidoka County: 28.5 per 100,000 peopleNez Perce County: 21.7 per 100,000 peopleOneida County: 111.8 per 100,000 peopleOwyhee County: 8.7 per 100,000 peoplePayette County: 16.5 per 100,000 peoplePower County: 38.2 per 100,000 peopleShoshone County: 7.7 per 100,000 peopleTeton County: 18.2 per 100,000 peopleTwin Falls County: 11.4 per 100,000 peopleValley County: 18 per 100,000 peopleWashington County: 19.5 per 100,000 people
  • Under 7
  • 7 to 11
  • 11 to 16
  • 16 to 24
  • 24 to 55
  • 55 and over
per 100,000 people, 2018. Source: Invokely calculation with data from NHTSA, BEA. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2018

Clark County: 124.2 per 100,000 peopleClark County124.2Oneida County: 111.8 per 100,000 peopleOneida County111.8Lincoln County: 96.5 per 100,000 peopleLincoln County96.5Boise County: 81.9 per 100,000 peopleBoise County81.9Adams County: 71.7 per 100,000 peopleAdams County71.7Caribou County: 57.7 per 100,000 peopleCaribou County57.7Lewis County: 55.8 per 100,000 peopleLewis County55.8Idaho County: 55.3 per 100,000 peopleIdaho County55.3Benewah County: 53.7 per 100,000 peopleBenewah County53.7Fremont County: 45.1 per 100,000 peopleFremont County45.1Power County: 38.2 per 100,000 peoplePower County38.2Jerome County: 37.8 per 100,000 peopleJerome County37.8Minidoka County: 28.5 per 100,000 peopleMinidoka County28.5Lemhi County: 25.3 per 100,000 peopleLemhi County25.3Elmore County: 24.7 per 100,000 peopleElmore County24.7Nez Perce County: 21.7 per 100,000 peopleNez Perce County21.7Washington County: 19.5 per 100,000 peopleWashington County19.5Teton County: 18.2 per 100,000 peopleTeton County18.2Valley County: 18 per 100,000 peopleValley County18Bonner County: 17.7 per 100,000 peopleBonner County17.7Payette County: 16.5 per 100,000 peoplePayette County16.5Bear Lake County: 16.1 per 100,000 peopleBear Lake County16.1Bingham County: 15 per 100,000 peopleBingham County15Franklin County: 14.5 per 100,000 peopleFranklin County14.5Jefferson County: 13.4 per 100,000 peopleJefferson County13.4Canyon County: 12.7 per 100,000 peopleCanyon County12.7Twin Falls County: 11.4 per 100,000 peopleTwin Falls County11.4Gem County: 11.1 per 100,000 peopleGem County11.1Kootenai County: 11.1 per 100,000 peopleKootenai County11.1Latah County: 10.3 per 100,000 peopleLatah County10.3Bannock County: 9.4 per 100,000 peopleBannock County9.4Bonneville County: 9.3 per 100,000 peopleBonneville County9.3Owyhee County: 8.7 per 100,000 peopleOwyhee County8.7Boundary County: 8.6 per 100,000 peopleBoundary County8.6Blaine County: 8.5 per 100,000 peopleBlaine County8.5Shoshone County: 7.7 per 100,000 peopleShoshone County7.7Ada County: 6.6 per 100,000 peopleAda County6.6Gooding County: 6.6 per 100,000 peopleGooding County6.6Cassia County: 4.1 per 100,000 peopleCassia County4.1Madison County: 2 per 100,000 peopleMadison County2Butte County: 0 per 100,000 peopleButte County0Camas County: 0 per 100,000 peopleCamas County0Clearwater County: 0 per 100,000 peopleClearwater County0Custer County: 0 per 100,000 peopleCuster County0Clark County: 124.2 per 100,000 peopleClark County124.2Oneida County: 111.8 per 100,000 peopleOneida County111.8Lincoln County: 96.5 per 100,000 peopleLincoln County96.5Boise County: 81.9 per 100,000 peopleBoise County81.9Adams County: 71.7 per 100,000 peopleAdams County71.7Caribou County: 57.7 per 100,000 peopleCaribou County57.7Lewis County: 55.8 per 100,000 peopleLewis County55.8Idaho County: 55.3 per 100,000 peopleIdaho County55.3Benewah County: 53.7 per 100,000 peopleBenewah County53.7Fremont County: 45.1 per 100,000 peopleFremont County45.1Power County: 38.2 per 100,000 peoplePower County38.2Jerome County: 37.8 per 100,000 peopleJerome County37.8Minidoka County: 28.5 per 100,000 peopleMinidoka County28.5Lemhi County: 25.3 per 100,000 peopleLemhi County25.3Elmore County: 24.7 per 100,000 peopleElmore County24.7Nez Perce County: 21.7 per 100,000 peopleNez Perce County21.7Washington County: 19.5 per 100,000 peopleWashington County19.5Teton County: 18.2 per 100,000 peopleTeton County18.2Valley County: 18 per 100,000 peopleValley County18Bonner County: 17.7 per 100,000 peopleBonner County17.7Payette County: 16.5 per 100,000 peoplePayette County16.5Bear Lake County: 16.1 per 100,000 peopleBear Lake County16.1Bingham County: 15 per 100,000 peopleBingham County15Franklin County: 14.5 per 100,000 peopleFranklin County14.5Jefferson County: 13.4 per 100,000 peopleJefferson County13.4Canyon County: 12.7 per 100,000 peopleCanyon County12.7Twin Falls County: 11.4 per 100,000 peopleTwin Falls County11.4Gem County: 11.1 per 100,000 peopleGem County11.1Kootenai County: 11.1 per 100,000 peopleKootenai County11.1Latah County: 10.3 per 100,000 peopleLatah County10.3Bannock County: 9.4 per 100,000 peopleBannock County9.4Bonneville County: 9.3 per 100,000 peopleBonneville County9.3Owyhee County: 8.7 per 100,000 peopleOwyhee County8.7Boundary County: 8.6 per 100,000 peopleBoundary County8.6Blaine County: 8.5 per 100,000 peopleBlaine County8.5Shoshone County: 7.7 per 100,000 peopleShoshone County7.7Ada County: 6.6 per 100,000 peopleAda County6.6Gooding County: 6.6 per 100,000 peopleGooding County6.6Cassia County: 4.1 per 100,000 peopleCassia County4.1Madison County: 2 per 100,000 peopleMadison County2Butte County: 0 per 100,000 peopleButte County0Camas County: 0 per 100,000 peopleCamas County0Clearwater County: 0 per 100,000 peopleClearwater County0Custer County: 0 per 100,000 peopleCuster County0
per 100,000 people. Source: Invokely calculation with data from NHTSA, BEA. Retrieved 2026-10-12.

Full ranking

RankCounties2018
per 100,000 people		Change on 2017
1Clark County124.2+124.2 pts
2Oneida County111.8+66.6 pts
3Lincoln County96.5+58.1 pts
4Boise County81.9+25.2 pts
5Adams County71.7-50.2 pts
6Caribou County57.7+43.2 pts
7Lewis County55.8+28.5 pts
8Idaho County55.3+6 pts
9Benewah County53.7+53.7 pts
10Fremont County45.1+30 pts
11Power County38.2+12.4 pts
12Jerome County37.8-4.7 pts
13Minidoka County28.5+4.7 pts
14Lemhi County25.3+12.5 pts
15Elmore County24.7-18.5 pts
16Nez Perce County21.7+4.7 pts
17Washington County19.5-0.1 pts
18Teton County18.2+18.2 pts
19Valley County18-65.8 pts
20Bonner County17.7+1.8 pts
21Payette County16.5-0.3 pts
22Bear Lake County16.1-16.2 pts
23Bingham County15-2.2 pts
24Franklin County14.5-0.2 pts
25Jefferson County13.4-0.5 pts
26Canyon County12.7+2.4 pts
27Twin Falls County11.4+1 pts
28Gem County11.1-0.2 pts
29Kootenai County11.1-0.9 pts
30Latah County10.30 pts
31Bannock County9.4-6 pts
32Bonneville County9.3-0.2 pts
33Owyhee County8.7-26 pts
34Boundary County8.6-8.6 pts
35Blaine County8.5-4.5 pts
36Shoshone County7.7-55.2 pts
37Ada County6.60 pts
38Gooding County6.6-32.9 pts
39Cassia County4.1-16.7 pts
40Madison County2-2.1 pts
41Butte County0-78.7 pts
41Camas County00 pts
41Clearwater County0-11.7 pts
41Custer County0-48.3 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, 2018) [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, 2018. 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, 2018. 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, 2018 [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_2018,
  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, 2018}},
  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=2018. 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, 2018
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=2018
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=2018.
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?

Clark County, with 124.2 per 100,000 people in 2018, according to NHTSA and BEA.

Which county has the lowest traffic fatality rate?

Custer County, with 0 per 100,000 people in 2018.

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