Idaho in 2021
Deaths 273Fatal crashes 246Per 100,000 14.3US deaths 43,230
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. Final FARS file for 2021.
In 2021, 273 people died in 246 fatal crashes in Idaho, 14.3 deaths per 100,000 residents against 13.0 nationally.
The death toll rose 28% from 214 in 2020 to 273 in 2021.
Idaho accounted for 0.6% of the 43,230 crash deaths recorded nationally that year.
30.9% of the state's fatal crashes that year had at least one driver reported as drinking.
By FHWA road function class, the largest share was on other principal arterial roads (29%).
37% of the crashes happened between noon to 6pm; Saturday was the most common day.
Compared with 2020 and the nation
| Measure | Idaho 2021 | Idaho 2020 | United States 2021 |
|---|---|---|---|
| Deaths | 273 | 214 | 43,230 |
| Fatal crashes | 246 | 188 | 39,785 |
| Deaths per 100,000 residents | 14.3 | 11.6 | 13.0 |
| Crashes with a drinking driver | 31% | 34% | 26% |
Counties in 2021
Every county with a fatal crash in 2021, by deaths. Counts under three are shown as "1–2" (small-count rule); the per-100,000 column is blank for them. 40 counties listed.
| County | Fatal crashes | Deaths | Per 100,000 | Deaths 2015–2024 |
|---|---|---|---|---|
| Canyon County | 26 | 29 | 10.9 | 246 |
| Ada County | 21 | 21 | 3.9 | 259 |
| Bonneville County | 20 | 21 | 15.7 | 132 |
| Kootenai County | 20 | 20 | 10.6 | 154 |
| Elmore County | 14 | 16 | 53.8 | 90 |
| Bingham County | 11 | 16 | 31.4 | 99 |
| Jerome County | 13 | 13 | 49.9 | 100 |
| Bannock County | 11 | 13 | 14.3 | 99 |
| Boise County | 9 | 9 | 104.9 | 60 |
| Bonner County | 9 | 9 | 16.7 | 88 |
| Nez Perce County | 8 | 9 | 21.0 | 73 |
| Cassia County | 7 | 9 | 34.6 | 71 |
| Blaine County | 6 | 7 | 27.7 | 37 |
| Latah County | 6 | 7 | 16.6 | 26 |
| Owyhee County | 4 | 7 | 54.9 | 28 |
| Lemhi County | 6 | 6 | 71.5 | 21 |
| Idaho County | 5 | 6 | 33.5 | 82 |
| Payette County | 4 | 5 | 18.1 | 50 |
| Gooding County | 4 | 4 | 24.7 | 46 |
| Madison County | 4 | 4 | 7.2 | 24 |
| Twin Falls County | 4 | 4 | 4.1 | 112 |
| Gem County | 3 | 4 | 18.3 | 28 |
| Custer County | 3 | 3 | 65.3 | 21 |
| Fremont County | 3 | 3 | 20.8 | 37 |
| Valley County | 3 | 3 | 23.5 | 33 |
| Lincoln County | 1–2 | 3 | 54.0 | 31 |
| Benewah County | 1–2 | 1–2 | — | 18 |
| Butte County | 1–2 | 1–2 | — | 14 |
| Caribou County | 1–2 | 1–2 | — | 16 |
| Jefferson County | 1–2 | 1–2 | — | 35 |
| Minidoka County | 1–2 | 1–2 | — | 37 |
| Oneida County | 1–2 | 1–2 | — | 13 |
| Camas County | 1–2 | 1–2 | — | 4 |
| Clearwater County | 1–2 | 1–2 | — | 18 |
| Adams County | 1–2 | 1–2 | — | 23 |
| Boundary County | 1–2 | 1–2 | — | 15 |
| Clark County | 1–2 | 1–2 | — | 11 |
| Lewis County | 1–2 | 1–2 | — | 11 |
| Teton County | 1–2 | 1–2 | — | 16 |
| Washington County | 1–2 | 1–2 | — | 21 |
Per 100,000 uses the 2024 population estimate for every year, so early-year rates are understated where a county has grown.
Hour of day
Weekday
Road type
Questions and answers
How many people died in crashes in Idaho in 2021?
273 people in 246 fatal crashes, according to NHTSA's FARS 2021 file, or 14.3 per 100,000 residents.
Which county in Idaho had the most crash deaths in 2021?
Canyon County with 29 deaths in 26 fatal crashes. The table on this page lists every county with a fatal crash that year.
How did 2021 compare with 2020 in Idaho?
273 deaths against 214 in 2020 (+28%). Nationally the 2021 total was 43,230.
Provenance
Source: NHTSA Fatality Analysis Reporting System, 2021 national file (accident table, vehicle and person tables); US Census Bureau population estimates. Data through 31 Dec 2024; generated 30 Sep 2026.