US 20 in Idaho: fatal crashes
From 2015 to 2024, 102 fatal crashes on US 20 in Idaho killed 119 people, the 3rd most of 66 numbered roads in Idaho. In 2024 there were 14 fatal crashes and 20 deaths on the road.
A US route running through 11 counties of Idaho. All fatal crashes in Idaho.
Deaths on US 20 in Idaho by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 14 | 20 |
| 2023 | 15 | 19 |
| 2022 | 10 | 10 |
| 2021 | 10 | 11 |
| 2020 | 10 | 12 |
| 2019 | 16 | 18 |
| 2018 | 9 | 10 |
| 2017 | 5 | 6 |
| 2016 | 5 | 5 |
| 2015 | 8 | 8 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on US 20 in Idaho: the counties with the most fatal crashes
Fremont County had the most fatal crashes on US 20 from 2015 to 2024: 21, with 26 deaths. Fremont, Canyon and Ada counties together held 56% of fatal crashes on US 20 in Idaho from 2015 to 2024; the 7 listed held 90%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Fremont County | 1 | 21 | 26 |
| 2 | Canyon County | 4 | 21 | 22 |
| 3 | Ada County | 3 | 15 | 15 |
| 4 | Bonneville County | 3 | 12 | 19 |
| 5 | Madison County | 1 | 10 | 10 |
| 6 | Butte County | 0 | 7 | 7 |
| 7 | Blaine County | 1 | 6 | 8 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen on US 20 in Idaho
101 fatal crashes on US 20 in Idaho from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. 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 | 2.0 percent, 2 fatal crashes | 1.0 percent, 1 fatal crash | 1.0 percent, 1 fatal crash | 1.0 percent, 1 fatal crash | 4.0 percent, 4 fatal crashes | 2.0 percent, 2 fatal crashes |
| Mon | 0.0 percent, 0 fatal crashes | 2.0 percent, 2 fatal crashes | 3.0 percent, 3 fatal crashes | 3.0 percent, 3 fatal crashes | 4.0 percent, 4 fatal crashes | 2.0 percent, 2 fatal crashes |
| Tue | 3.0 percent, 3 fatal crashes | 2.0 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 3.0 percent, 3 fatal crashes | 6.9 percent, 7 fatal crashes | 4.0 percent, 4 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 3.0 percent, 3 fatal crashes | 2.0 percent, 2 fatal crashes | 1.0 percent, 1 fatal crash | 2.0 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 1.0 percent, 1 fatal crash | 3.0 percent, 3 fatal crashes | 2.0 percent, 2 fatal crashes | 1.0 percent, 1 fatal crash | 7.9 percent, 8 fatal crashes | 2.0 percent, 2 fatal crashes |
| Fri | 1.0 percent, 1 fatal crash | 1.0 percent, 1 fatal crash | 2.0 percent, 2 fatal crashes | 7.9 percent, 8 fatal crashes | 3.0 percent, 3 fatal crashes | 1.0 percent, 1 fatal crash |
| Sat | 2.0 percent, 2 fatal crashes | 2.0 percent, 2 fatal crashes | 2.0 percent, 2 fatal crashes | 4.0 percent, 4 fatal crashes | 4.0 percent, 4 fatal crashes | 2.0 percent, 2 fatal crashes |
By hour
By month
- Jan2.9%
- Feb5.9%
- Mar3.9%
- Apr6.9%
- May8.8%
- Jun7.8%
- Jul16.7%
- Aug9.8%
- Sep10.8%
- Oct7.8%
- Nov9.8%
- Dec8.8%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes on US 20 in Idaho first hit
The first harmful event was a collision with another vehicle in most fatal crashes, 59%; a rollover in 17%, a fixed object such as a tree, pole or barrier in 11%, a pedestrian in 8.8%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 60 | 59% |
| Rollover | 17 | 17% |
| Fixed object (tree, pole, barrier, ditch) | 11 | 11% |
| Pedestrian | 9 | 8.8% |
| Other | 4 | 3.9% |
| Cyclist | 1 | 1.0% |
| Parked vehicle | 0 | 0.0% |
| 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
How fatal crashes on US 20 in Idaho compare with the state
The largest difference from Idaho: from 2015 to 2024, 46% of occupants killed on US 20 in Idaho were unbelted, against 58% across Idaho. Below the Idaho share: drinking drivers. Shares of fatal crashes from 2015 to 2024, against the share across all of Idaho. A share is only given over 20 crashes; above or below means more than chance would give on 102 crashes.
| US 20 | Idaho | ||
|---|---|---|---|
| On rural stretches | 77% | 75% | about the same as the Idaho share |
| At or near an intersection | 26% | 21% | about the same as the Idaho share |
| In the dark, road unlit | 25% | 27% | about the same as the Idaho share |
| A drinking driver | 21% | 31% | below the Idaho share |
| Speeding | 17% | 22% | about the same as the Idaho share |
| A distracted driver (as recorded) | 14% | 15% | about the same as the Idaho share |
| Occupants killed unbelted | 46% | 58% | below the Idaho share |
| Hit-and-run | 1.0% | 1.7% | about the same as the Idaho share |
| A motorcycle involved | 7.8% | 14% | about the same as the Idaho share |
| Pedestrians among the dead | 7.6% | 6.9% | about the same as the Idaho share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes on US 20 in Idaho
- How many fatal crashes have there been on US 20 in Idaho?
- 102 fatal crashes killed 119 people on US 20 in Idaho from 2015 to 2024. In 2024 there were 14 fatal crashes and 20 deaths. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Where on US 20 in Idaho do the most fatal crashes happen?
- Fremont County had the most fatal crashes on US 20 from 2015 to 2024: 21, with 26 deaths. Canyon County was second with 21.
Other roads in Idaho with a page
All fatal crashes in Idaho, with every road ranked.
Where the US 20 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as US 20 in Idaho (filed under 10 spellings, such as "US- 20/26 CHINDEN BLVD", "US-20", "US-20 MYRTLE ST", "US-20 W BROADWAY"). Ramps, frontage and service roads are left out. Where two routes share a road, NHTSA files each crash under one of them, so a shared stretch counts on one route only. A fatal crash is one in which someone died within 30 days. Totals in state and news reports for a road usually differ: they include ramps and frontage roads, or count from preliminary reports. The full method.