Fatal Roads

States › Idaho

ID

State

Idaho

Residents 2,001,619Deaths 2024 238Deaths 2015–2024 2,387Counties 44Routes with pages 14

FARS data are based on police crash reports and other sources; the drunk-driving measure is based on the highest BAC of any driver in the crash. Latest data year: 2024.

Idaho recorded 238 deaths in 219 fatal crashes in 2024, the latest year in NHTSA's FARS, and 2,387 deaths over 2015–2024.

That is 13.1 deaths per 100,000 residents a year, close to the national rate of 11.8. The ten-year total rose 8% from 2,212 in 2005–2014 to 2,387 in 2015–2024.

Relative to the national shares, alcohol (a driver reported as drinking) stands out most: 31.2% of fatal crashes against 26.3% nationally. 74.5% of the state's fatal crashes were on rural roads and 35.7% happened after dark.

Among counties with at least 50 deaths in the ten years, the highest rates per 100,000 residents were in Boise County (76.5), Idaho County (48.5) and Jerome County (40.9).

238deaths in 2024219 fatal crashes
13.1per 100,000 residents a year, 2015–2024US 11.8
+8%ten-year change in deaths2,212 → 2,387
31%crashes with a drinking driverUS 26%

Trend since 1975

0167333197519801985199019952000200520102015202020241975: 281 deaths1976: 279 deaths1977: 325 deaths1978: 327 deaths1979: 333 deaths1980: 331 deaths1981: 293 deaths1982: 256 deaths1983: 263 deaths1984: 242 deaths1985: 255 deaths1986: 258 deaths1987: 260 deaths1988: 257 deaths1989: 238 deaths1990: 244 deaths1991: 264 deaths1992: 243 deaths1993: 230 deaths1994: 250 deaths1995: 262 deaths1996: 258 deaths1997: 259 deaths1998: 265 deaths1999: 278 deaths2000: 276 deaths2001: 259 deaths2002: 264 deaths2003: 293 deaths2004: 260 deaths2005: 275 deaths2006: 267 deaths2007: 252 deaths2008: 232 deaths2009: 226 deaths2010: 209 deaths2011: 167 deaths2012: 184 deaths2013: 214 deaths2014: 186 deaths2015: 216 deaths2016: 253 deaths2017: 245 deaths2018: 234 deaths2019: 224 deaths2020: 214 deaths2021: 273 deaths2022: 215 deaths2023: 275 deaths2024: 238 deaths
People killed in crashes in Idaho by year, 1975–2024. Latest point: 2024, 238 deaths.

Rate per 100,000 residents, 2000–2024

011222000200520102015202020242000: 21.22001: 19.62002: 19.72003: 21.52004: 18.72005: 19.32006: 18.22007: 16.72008: 15.12009: 14.52010: 13.32011: 10.52012: 11.52013: 13.32014: 11.42015: 13.12016: 152017: 14.22018: 13.42019: 12.52020: 11.62021: 14.32022: 11.12023: 142024: 11.9
Deaths per 100,000 residents in Idaho and nationally, 2000–2024. Latest point: 2024, 11.9. this page United States

Year pages: 20242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999199819971996199519941993199219911990198919881987198619851984198319821981198019791978197719761975

Compared with the nation

MeasureIdahoUnited States
Deaths per 100,000 residents a year, 2015–202413.111.8
Deaths per 100,000 residents, 202411.911.5
Deaths, 2015–20242,387389,190
Deaths per fatal crash1.11.1
Change vs previous ten years+8%+7%
Share of the national toll0.6%100%

Factors

Alcoholcrashes with a driver reported as drinking31.2%
Speedingcrashes with a speeding-related driver22.4%
Pedestriansshare of people killed6.9%
Motorcyclistsshare of people killed13.1%
Unrestrainedoccupant deaths with no restraint used58.3%
In darknesscrashes after dark35.7%
Rural roadscrashes on rural roads74.5%

tick marks the US share. Bars are shares of fatal crashes (alcohol, speeding, darkness, rural) or of people killed (pedestrians, motorcyclists, unrestrained occupants) over the ten-year window.

Counties ranked by rate

Deaths per 100,000 residents a year over 2015–2024. Small counties on through routes can rank high on few deaths; the deaths column gives the scale. Counties with fewer than 10 fatal crashes in the ten years show no factor shares.

#CountyResidentsDeaths 2015–2024Per 100k / yrDeaths 2024AlcoholSpeeding
1Clark County79411132.41–220%10%
2Boise County8,5816076.5333%28%
3Lincoln County5,5563158.0542%19%
4Butte County2,7351453.1029%14%
5Adams County4,9982352.11–215%15%
6Custer County4,5972148.71–240%15%
7Idaho County17,9128248.51532%19%
8Jerome County26,05610040.9733%19%
9Camas County1,247435.40——
10Elmore County29,7299032.1326%32%
11Gooding County16,1894629.6735%19%
12Lewis County3,7281129.21–227%9%
13Cassia County25,9767128.91237%21%
14Valley County12,7773328.5433%30%
15Oneida County4,9761328.41–217%0%
16Shoshone County14,0743728.0337%31%
17Fremont County14,3993727.41–232%19%
18Lemhi County8,3972126.1030%30%
19Owyhee County12,7482823.3340%20%
20Power County8,3811822.8339%28%
21Caribou County7,2391622.7021%21%
22Bingham County50,8899920.7835%13%
23Clearwater County9,1511820.41–238%38%
24Payette County27,6625020.0927%11%
25Washington County11,5392119.81–216%11%
26Benewah County10,5291818.71–224%35%
27Bonner County53,9558818.6632%33%
28Nez Perce County42,8477317.6732%32%
29Bear Lake County6,7791117.41–240%0%
30Minidoka County22,6913717.31–225%28%
31Blaine County25,2613715.61–240%30%
32Franklin County15,6382215.4535%25%
33Gem County21,8572814.71–232%8%
34Teton County12,9321613.41–217%17%
35Twin Falls County96,50911212.51425%16%
36Boundary County14,0401512.01–215%31%
37Bannock County91,0109911.3830%13%
38Jefferson County34,8543511.31–236%21%
39Bonneville County133,64413210.82333%29%
40Canyon County266,89224610.52328%15%
41Kootenai County188,3231549.11234%29%
42Latah County42,180266.41–236%36%
43Ada County535,7992595.32934%28%
44Madison County55,549245.148%13%

Routes with the most fatal crashes

#RouteTypeFatal crashesDeathsAlcoholSpeeding
1Interstate 84Interstate20021721%21%
2US Route 95US highway17920717%14%
3US Route 20US highway10011720%16%
4Interstate 15Interstate879628%10%
5State Route 55State highway657017%12%
6US Route 93US highway606642%13%
7US Route 30US highway536425%11%
8US Route 12US highway414220%20%
9US Route 26US highway404423%18%
10Interstate 90Interstate384229%53%
11US Route 91US highway303533%27%
12State Route 75State highway293541%14%
13State Route 21State highway272933%48%
14State Route 33State highway222623%14%

Signed Interstate, US and state routes with at least 20 fatal crashes in 2015–2024; 14 routes in Idaho qualify. Local streets and county roads are not listed. Long routes carry more traffic and so more crashes; this is a count, not a rate.

Time of day and day of week

12am3am6am9am12pm3pm6pm9pm
Sun
Mon
Tue
Wed
Thu
Fri
Sat

Fatal crashes in Idaho by weekday and hour, 2015–2024: darker cells are busier. 2,136 crashes with a known hour and weekday.

By weekday

Saturday18%
Friday15%
Sunday14%
Tuesday13%
Thursday13%
Monday13%
Wednesday13%

Light condition

Daylight58%
Dark, not lighted27%
Dark, lighted8%
Dusk4%
Dawn2%
Dark, lighting unknown0%

Road type

Other principal arterial33%
Major collector17%
Minor arterial16%
Interstate16%
Local14%
Minor collector3%
Other freeways and expressways1%

FHWA functional classes (FARS FUNC_SYS), share of fatal crashes with a reported class; tick marks the national share. What the classes mean.

Questions and answers

How many people died in crashes in Idaho in 2024?

238 people in 219 fatal crashes, per NHTSA's FARS annual file. Over 2015–2024 the total is 2,387.

How does Idaho compare with the national rate?

13.1 deaths per 100,000 residents a year over 2015–2024, against 11.8 nationally; in 2024 alone, 11.9 against 11.5.

Which counties in Idaho have the most fatal crashes?

By deaths over 2015–2024: Ada County (259), Canyon County (246) and Kootenai County (154). The county table ranks by rate per 100,000 residents instead, which is a fairer comparison across sizes.

What share of fatal crashes in Idaho involved alcohol or speeding?

31.2% of fatal crashes in 2015–2024 had a driver reported as drinking (US: 26.3%) and 22.4% had a speeding-related driver (US: 27.2%).

Which routes in Idaho have the most fatal crashes?

Interstate 84 (200 fatal crashes, 2015–2024), US Route 95 (179 fatal crashes, 2015–2024) and US Route 20 (100 fatal crashes, 2015–2024). Route pages exist for signed routes with at least 20 fatal crashes in the ten years.

Provenance

Source: NHTSA Fatality Analysis Reporting System annual files 1975–2024; US Census Bureau Population Estimates Program. Data through 31 Dec 2024; generated 30 Sep 2026. See methodology, sources and corrections.