The deadliest roads in Montana
I-90 had the most fatal crashes of any numbered road in Montana from 2015 to 2024: 201, with 224 deaths. Over 2022 to 2024 alone, US 93 had the most, 56 against 55 on I-90. The 28 roads listed held 51% of all fatal crashes in Montana from 2015 to 2024; 4 are interstates, 9 US routes, 15 state highways.
133 numbered roads in Montana recorded a fatal crash in those years; the 28 with 5 or more are ranked below, and 7 have a page of their own. All fatal crashes in Montana.
Every numbered road in Montana, ranked by fatal crashes
| Road | Kind | Fatal crashes | Deaths | 2022 to 2024 | Counties with the most | |
|---|---|---|---|---|---|---|
| 1 | I-90 | Interstate | 201 | 224 | 55 | Gallatin, Missoula, Big Horn |
| 2 | US 93 | US route | 121 | 131 | 56 | Lake, Missoula, Ravalli |
| 3 | US 2 | US route | 105 | 125 | 44 | Flathead, Lincoln, Roosevelt |
| 4 | US 87 | US route | 64 | 81 | 21 | Yellowstone, Cascade, Chouteau |
| 5 | I-15 | Interstate | 61 | 65 | 18 | Cascade, Beaverhead, Silver Bow |
| 6 | US 212 | US route | 59 | 68 | 20 | Big Horn, Rosebud, Carbon |
| 7 | State Highway 200 | State highway | 47 | 48 | 16 | Sanders, Missoula, Lewis and Clark |
| 8 | US 12 | US route | 45 | 49 | 10 | Lewis and Clark, Broadwater, Missoula |
| 9 | US 89 | US route | 36 | 38 | 11 | Park, Cascade, Glacier |
| 10 | I-94 | Interstate | 32 | 40 | 8 | Yellowstone, Rosebud, Dawson |
| 11 | US 191 | US route | 25 | 26 | 11 | Gallatin, Phillips, Fergus |
| 12 | US 310 | US route | 18 | 20 | 3 | Carbon, Yellowstone, Beaverhead |
| 13 | US 287 | US route | 17 | 19 | 3 | Madison, Broadwater, Lewis and Clark |
| 14 | State Highway 35 | State highway | 17 | 18 | 5 | Flathead, Lake |
| 15 | State Highway 83 | State highway | 16 | 17 | 8 | Lake, Missoula, Flathead |
| 16 | State Highway 451 | State highway | 9 | 10 | 0 | Big Horn |
| 17 | State Highway 16 | State highway | 8 | 9 | 1 | Richland, Sheridan, Dawson |
| 18 | State Highway 3 | State highway | 8 | 8 | 4 | Yellowstone |
| 19 | State Highway 1 | State highway | 7 | 7 | 3 | Granite, Deer Lodge |
| 20 | State Highway 56 | State highway | 7 | 7 | 3 | Lincoln, Sanders |
| 21 | I-90W | Interstate | 6 | 8 | 0 | Missoula, Gallatin, Granite |
| 22 | State Highway 28 | State highway | 6 | 8 | 2 | Sanders, Lake |
| 23 | State Highway 43 | State highway | 6 | 7 | 3 | Beaverhead |
| 24 | State Highway 314 | State highway | 5 | 7 | 0 | Big Horn |
| 25 | State Highway 313 | State highway | 5 | 6 | 0 | Big Horn |
| 26 | State Highway 39 | State highway | 5 | 6 | 0 | Rosebud |
| 27 | State Highway 2 | State highway | 5 | 5 | 2 | Silver Bow, Jefferson |
| 28 | State Highway 84 | State highway | 5 | 5 | 1 | Madison, Gallatin |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Download every numbered road in Montana as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/deadliest-roads/montana/, from NHTSA FARS (2024 Annual Report File).”
Interstates in Montana per mile
Fatal crashes a year per 100 miles of road, 2015 to 2024, for interstates with 20 miles or more in Montana. Crashes per mile of road, not per vehicle. Mileage from the FHWA Interstate route log.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about the deadliest roads in Montana
- What is the deadliest road in Montana?
- I-90 had the most fatal crashes of any numbered road in Montana from 2015 to 2024: 201, with 224 deaths. US 93 was second with 121 and US 2 third with 105. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Which interstate in Montana is the most dangerous per mile?
- I-90, with 3.7 fatal crashes a year per 100 miles over 2015 to 2024 on 545 miles. That is crashes per mile of road, not per vehicle.
- How many fatal crashes in Montana happen on numbered roads?
- 1,123 of 1,864 fatal crashes in Montana from 2015 to 2024 (60%) were filed on an interstate, US or state route; the rest were on county roads, city streets and unnamed roads, which are in the state's total but not ranked here.
Where the Montana road numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash filed on a numbered interstate, US or state route in Montana, read from the road name NHTSA filed, with ramps, frontage and service roads left out. A road gets its own page with 15 or more fatal crashes from 2022 to 2024. The full method.