Idaho in 2018
Deaths 234Fatal crashes 215Per 100,000 13.4US deaths 36,835
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 2018.
In 2018, 234 people died in 215 fatal crashes in Idaho, 13.4 deaths per 100,000 residents against 11.3 nationally.
The death toll was about level between 2017 (245) and 2018 (234).
Idaho accounted for 0.6% of the 36,835 crash deaths recorded nationally that year.
23.7% 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 (37%).
36% of the crashes happened between noon to 6pm; Friday was the most common day.
Compared with 2017 and the nation
| Measure | Idaho 2018 | Idaho 2017 | United States 2018 |
|---|---|---|---|
| Deaths | 234 | 245 | 36,835 |
| Fatal crashes | 215 | 224 | 33,919 |
| Deaths per 100,000 residents | 13.4 | 14.2 | 11.3 |
| Crashes with a drinking driver | 24% | 29% | 26% |
Counties in 2018
Every county with a fatal crash in 2018, 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 |
|---|---|---|---|---|
| Ada County | 28 | 31 | 5.8 | 259 |
| Canyon County | 25 | 28 | 10.5 | 246 |
| Kootenai County | 18 | 18 | 9.6 | 154 |
| Bonneville County | 11 | 11 | 8.2 | 132 |
| Twin Falls County | 9 | 10 | 10.4 | 112 |
| Nez Perce County | 9 | 9 | 21.0 | 73 |
| Jerome County | 8 | 9 | 34.5 | 100 |
| Idaho County | 5 | 9 | 50.2 | 82 |
| Bannock County | 8 | 8 | 8.8 | 99 |
| Bonner County | 7 | 8 | 14.8 | 88 |
| Bingham County | 7 | 7 | 13.8 | 99 |
| Elmore County | 7 | 7 | 23.5 | 90 |
| Boise County | 6 | 6 | 69.9 | 60 |
| Minidoka County | 6 | 6 | 26.4 | 37 |
| Fremont County | 5 | 6 | 41.7 | 37 |
| Oneida County | 5 | 5 | 100.5 | 13 |
| Benewah County | 4 | 5 | 47.5 | 18 |
| Lincoln County | 4 | 5 | 90.0 | 31 |
| Jefferson County | 4 | 4 | 11.5 | 35 |
| Latah County | 4 | 4 | 9.5 | 26 |
| Payette County | 4 | 4 | 14.5 | 50 |
| Caribou County | 3 | 4 | 55.3 | 16 |
| Adams County | 3 | 3 | 60.0 | 23 |
| Power County | 3 | 3 | 35.8 | 18 |
| Blaine County | 1–2 | 1–2 | — | 37 |
| Gem County | 1–2 | 1–2 | — | 28 |
| Lewis County | 1–2 | 1–2 | — | 11 |
| Teton County | 1–2 | 1–2 | — | 16 |
| Valley County | 1–2 | 1–2 | — | 33 |
| Washington County | 1–2 | 1–2 | — | 21 |
| Franklin County | 1–2 | 1–2 | — | 22 |
| Lemhi County | 1–2 | 1–2 | — | 21 |
| Bear Lake County | 1–2 | 1–2 | — | 11 |
| Boundary County | 1–2 | 1–2 | — | 15 |
| Cassia County | 1–2 | 1–2 | — | 71 |
| Clark County | 1–2 | 1–2 | — | 11 |
| Gooding County | 1–2 | 1–2 | — | 46 |
| Madison County | 1–2 | 1–2 | — | 24 |
| Owyhee County | 1–2 | 1–2 | — | 28 |
| Shoshone County | 1–2 | 1–2 | — | 37 |
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 2018?
234 people in 215 fatal crashes, according to NHTSA's FARS 2018 file, or 13.4 per 100,000 residents.
Which county in Idaho had the most crash deaths in 2018?
Ada County with 31 deaths in 28 fatal crashes. The table on this page lists every county with a fatal crash that year.
How did 2018 compare with 2017 in Idaho?
234 deaths against 245 in 2017 (+-4%). Nationally the 2018 total was 36,835.
Provenance
Source: NHTSA Fatality Analysis Reporting System, 2018 national file (accident table, vehicle and person tables); US Census Bureau population estimates. Data through 31 Dec 2024; generated 30 Sep 2026.