I-15 in Montana: fatal crashes
From 2015 to 2024, 61 fatal crashes on I-15 in Montana killed 65 people, the 5th most of any numbered road in Montana. In 2024 there were 6 fatal crashes and 6 deaths on the road.
An interstate running through 9 counties of Montana. All fatal crashes in Montana.
Deaths on I-15 in Montana by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2015 | 6 | 6 |
| 2016 | 3 | 5 |
| 2017 | 7 | 7 |
| 2018 | 5 | 5 |
| 2019 | 7 | 7 |
| 2020 | 6 | 6 |
| 2021 | 9 | 10 |
| 2022 | 6 | 6 |
| 2023 | 6 | 7 |
| 2024 | 6 | 6 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on I-15 in Montana: the counties with the most fatal crashes
Cascade County had the most fatal crashes on I-15 from 2015 to 2024: 16, with 18 deaths. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Cascade | 2 | 16 | 18 |
| 2 | Beaverhead | 2 | 10 | 11 |
| 3 | Jefferson | 0 | 9 | 9 |
| 4 | Silver Bow | 0 | 9 | 9 |
| 5 | Pondera | 1 | 5 | 6 |
| 6 | Lewis And Clark | 0 | 5 | 5 |
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 I-15 in Montana
Too few crashes to name a heaviest slot. The grid shows the shares; a share is only given over 20 crashes.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 8.2 percent, 5 fatal crashes | 4.9 percent, 3 fatal crashes | 1.6 percent, 1 fatal crashes | 1.6 percent, 1 fatal crashes |
| Mon | 1.6 percent, 1 fatal crashes | 4.9 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 8.2 percent, 5 fatal crashes | 3.3 percent, 2 fatal crashes | 1.6 percent, 1 fatal crashes |
| Tue | 0.0 percent, 0 fatal crashes | 1.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 3.3 percent, 2 fatal crashes | 6.6 percent, 4 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 1.6 percent, 1 fatal crashes | 1.6 percent, 1 fatal crashes | 1.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 4.9 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 1.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 3.3 percent, 2 fatal crashes | 3.3 percent, 2 fatal crashes | 1.6 percent, 1 fatal crashes | 1.6 percent, 1 fatal crashes |
| Fri | 3.3 percent, 2 fatal crashes | 1.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 3.3 percent, 2 fatal crashes | 3.3 percent, 2 fatal crashes | 1.6 percent, 1 fatal crashes |
| Sat | 1.6 percent, 1 fatal crashes | 1.6 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 3.3 percent, 2 fatal crashes | 4.9 percent, 3 fatal crashes | 6.6 percent, 4 fatal crashes |
By hour
By month
- Jan8.2%
- Feb0.0%
- Mar4.9%
- Apr8.2%
- May13.1%
- Jun11.5%
- Jul18.0%
- Aug9.8%
- Sep4.9%
- Oct4.9%
- Nov4.9%
- Dec11.5%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes on I-15 in Montana first hit
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Rollover | 25 | 41% |
| Fixed object (tree, pole, barrier, ditch) | 22 | 36% |
| Collision with another vehicle | 7 | 12% |
| Pedestrian | 3 | 4.9% |
| Other | 3 | 4.9% |
| Parked vehicle | 1 | 1.6% |
| Cyclist | 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 I-15 in Montana compare with the state
Shares of fatal crashes from 2015 to 2024, against the share across all of Montana. A share is only given over 20 crashes.
| I-15 | Montana | ||
|---|---|---|---|
| On rural stretches | 89% | 84% | above the Montana share |
| At or near an intersection | 0.0% | 15% | below the Montana share |
| In the dark, road unlit | 30% | 35% | below the Montana share |
| A drinking driver | 26% | 44% | below the Montana share |
| Speeding | 28% | 36% | below the Montana share |
| Occupants killed unbelted | 60% | 64% | below the Montana share |
| Hit-and-run | 3.3% | 2.7% | about the same as the Montana share |
| A motorcycle involved | 13% | 14% | about the same as the Montana share |
| Pedestrians among the dead | 6.2% | 7.5% | below the Montana share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Other roads in Montana with a page
All fatal crashes in Montana, with every road ranked.
Where the I-15 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as I-15 in Montana (filed under 4 spellings, such as "I- 15", "I-15", "I-15 N", "I-15 S"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.