Fatal crashes in Idaho
In 2024, 238 people died in 219 fatal crashes on Idaho roads, 13.5% fewer than in 2023. That is about 1 death a day, and 0.6% of all road deaths in the United States.
Idaho ranks 39th of 51 by road deaths in 2024.
Road deaths in Idaho since 1975
Deaths within 30 days of a crash on a public road, as NHTSA counts them. 2024 is the latest year NHTSA has published; the 2024 figures are from the Annual Report File and may be revised when NHTSA releases the final file. The 2025 file is expected in spring 2027.
The deadliest roads in Idaho
I-84 had the most fatal crashes of any numbered road in Idaho from 2015 to 2024: 187, with 204 deaths. Interstate, US and state routes ranked by fatal crashes from 2015 to 2024; ramps and frontage roads are left out (24 crashes). Roads with 15 or more fatal crashes in 2022 to 2024 have their own page.
| Road | Fatal crashes | Deaths | 2022 to 2024 | Counties with the most | |
|---|---|---|---|---|---|
| 1 | I-84 | 187 | 204 | 46 | Elmore, Ada, Jerome |
| 2 | US 95 | 178 | 206 | 50 | Kootenai, Idaho, Nez Perce |
| 3 | US 20 | 102 | 119 | 39 | Canyon, Fremont, Ada |
| 4 | I-15 | 86 | 95 | 19 | Bannock, Bingham, Bonneville |
| 5 | State Highway 55 | 66 | 71 | 19 | Canyon, Boise, Valley |
| 6 | US 93 | 60 | 66 | 19 | Twin Falls, Jerome, Lemhi |
| 7 | US 30 | 53 | 64 | 15 | Twin Falls, Bannock, Cassia |
| 8 | US 26 | 41 | 45 | 8 | Bonneville, Bingham, Lincoln |
| 9 | US 12 | 40 | 41 | 16 | Idaho, Nez Perce, Clearwater |
| 10 | I-90 | 31 | 33 | 6 | Kootenai, Shoshone |
| 11 | US 91 | 30 | 35 | 12 | Bannock, Franklin, Bingham |
| 12 | State Highway 75 | 29 | 35 | 6 | Blaine, Custer, Lincoln |
| 13 | State Highway 21 | 27 | 29 | 9 | Boise, Ada, Custer |
| 14 | State Highway 33 | 22 | 26 | 11 | Teton, Jefferson, Madison |
| 15 | I-86 | 16 | 17 | 10 | Power, Cassia, Bannock |
| 16 | State Highway 16 | 16 | 17 | 5 | Gem, Ada |
| 17 | State Highway 39 | 15 | 17 | 5 | Bingham, Power |
| 18 | State Highway 44 | 15 | 16 | 5 | Ada, Canyon |
| 19 | State Highway 53 | 13 | 14 | 3 | Kootenai |
| 20 | State Highway 25 | 12 | 15 | 6 | Jerome, Minidoka |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest counties in Idaho
Ada County had the most fatal crashes in Idaho from 2015 to 2024: 240, with 259 deaths. 44 counties in Idaho recorded a fatal crash in those years; the 20 with the most are listed.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Ada | 29 | 240 | 259 |
| 2 | Canyon | 21 | 227 | 246 |
| 3 | Kootenai | 12 | 143 | 154 |
| 4 | Bonneville | 16 | 116 | 132 |
| 5 | Twin Falls | 13 | 101 | 112 |
| 6 | Jerome | 7 | 90 | 100 |
| 7 | Bingham | 7 | 85 | 99 |
| 8 | Bannock | 7 | 84 | 99 |
| 9 | Elmore | 3 | 82 | 90 |
| 10 | Bonner | 5 | 76 | 88 |
| 11 | Idaho | 13 | 69 | 82 |
| 12 | Nez Perce | 7 | 69 | 73 |
| 13 | Cassia | 11 | 62 | 71 |
| 14 | Boise | 3 | 58 | 60 |
| 15 | Payette | 9 | 45 | 50 |
| 16 | Gooding | 7 | 43 | 46 |
| 17 | Minidoka | 2 | 36 | 37 |
| 18 | Shoshone | 3 | 35 | 37 |
| 19 | Jefferson | 1 | 33 | 35 |
| 20 | Fremont | 1 | 31 | 37 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen in Idaho
The heaviest slot is Saturday, 4 to 8 pm, with 98 fatal crashes from 2015 to 2024. The worst hour is 4 pm to 5 pm; the worst month is July.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 2.8 percent, 60 fatal crashes | 1.4 percent, 29 fatal crashes | 1.7 percent, 36 fatal crashes | 2.7 percent, 58 fatal crashes | 3.8 percent, 82 fatal crashes | 1.7 percent, 37 fatal crashes |
| Mon | 0.9 percent, 20 fatal crashes | 1.4 percent, 30 fatal crashes | 2.7 percent, 57 fatal crashes | 2.9 percent, 62 fatal crashes | 3.2 percent, 68 fatal crashes | 2.0 percent, 42 fatal crashes |
| Tue | 1.2 percent, 26 fatal crashes | 1.8 percent, 39 fatal crashes | 1.7 percent, 36 fatal crashes | 3.5 percent, 75 fatal crashes | 3.4 percent, 73 fatal crashes | 1.8 percent, 39 fatal crashes |
| Wed | 0.8 percent, 18 fatal crashes | 2.2 percent, 46 fatal crashes | 2.2 percent, 48 fatal crashes | 2.2 percent, 48 fatal crashes | 3.4 percent, 72 fatal crashes | 1.8 percent, 39 fatal crashes |
| Thu | 1.0 percent, 22 fatal crashes | 1.4 percent, 30 fatal crashes | 2.1 percent, 44 fatal crashes | 3.4 percent, 73 fatal crashes | 3.3 percent, 70 fatal crashes | 2.0 percent, 43 fatal crashes |
| Fri | 1.7 percent, 37 fatal crashes | 1.6 percent, 35 fatal crashes | 1.9 percent, 40 fatal crashes | 3.4 percent, 73 fatal crashes | 4.0 percent, 85 fatal crashes | 2.6 percent, 56 fatal crashes |
| Sat | 2.4 percent, 52 fatal crashes | 1.7 percent, 37 fatal crashes | 2.1 percent, 45 fatal crashes | 3.7 percent, 78 fatal crashes | 4.6 percent, 98 fatal crashes | 3.7 percent, 78 fatal crashes |
By hour
By month
- Jan4.4%
- Feb5.1%
- Mar5.5%
- Apr6.7%
- May9.0%
- Jun10.7%
- Jul12.4%
- Aug11.2%
- Sep9.9%
- Oct10.1%
- Nov7.5%
- Dec7.6%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where fatal crashes happen in Idaho: rural or urban, intersection, dark or daylight
Shares of fatal crashes from 2015 to 2024, against the share across the United States.
| Idaho | US | ||
|---|---|---|---|
| On rural roads | 75% | 43% | above the US share |
| At or near an intersection | 21% | 25% | below the US share |
| In daylight | 58% | 46% | above the US share |
| In the dark, road lit | 8.5% | 21% | below the US share |
| In the dark, road unlit | 27% | 28% | about the same as the US share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Who died on Idaho roads in 2024
| Road user | Deaths | Share |
|---|---|---|
| Vehicle occupants | 174 | 73% |
| Motorcyclists | 47 | 20% |
| Pedestrians | 14 | 5.9% |
| Cyclists | 3 | 1.3% |
| Others (on personal conveyances, in parked vehicles, in buildings) | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes happen in Idaho: alcohol, speeding, seat belts, hit-and-run
Shares of fatal crashes from 2015 to 2024 with the factor recorded, against the US share. "A drinking driver" is NHTSA's drinking-driver flag (police-reported drinking or any positive alcohol test), not its "alcohol-impaired" figure. "Unbelted" is the share of passenger-vehicle occupants killed whose belt use is known (1,520 in Idaho).
| Idaho | US | ||
|---|---|---|---|
| A drinking driver | 31% | 26% | above the US share |
| Speeding | 22% | 27% | below the US share |
| Occupants killed unbelted | 58% | 49% | above the US share |
| Hit-and-run | 1.7% | 6.5% | below the US share |
| A motorcycle involved | 14% | 16% | below the US share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What the first harmful event was
What each fatal crash first hit, 2015 to 2024.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 846 | 39% |
| Fixed object (tree, pole, barrier, ditch) | 523 | 24% |
| Rollover | 468 | 22% |
| Pedestrian | 156 | 7.2% |
| Other | 117 | 5.4% |
| Cyclist | 33 | 1.5% |
| Parked vehicle | 16 | 0.7% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Vehicles in fatal crashes in Idaho
Every vehicle in a fatal crash from 2015 to 2024, by body type (3,156 vehicles).
| Type | Vehicles | Share |
|---|---|---|
| Cars | 929 | 29% |
| Pickups | 724 | 23% |
| SUVs | 617 | 20% |
| Motorcycles | 318 | 10% |
| Truck-tractors | 267 | 8.5% |
| Other trucks | 198 | 6.3% |
| Vans | 100 | 3.2% |
| Buses | 3 | 0.1% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Road pages for Idaho
Every numbered road in Idaho with 15 or more fatal crashes from 2022 to 2024, each with its crashes by year, county, hour and weekday.
Where the Idaho numbers come from
Every figure on this page is counted from NHTSA's Fatality Analysis Reporting System, the federal census of fatal crashes on US public roads, 2024 Annual Report File. A fatal crash is one in which someone died within 30 days. Road names are normalised ("I35 FRONTAGE" and "I-35" are the same road; frontage roads and ramps are left out of road counts). Fields NHTSA coded as unknown show as "Not reported"; a share is only given over 20 crashes, otherwise "Not enough data". The full method.