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Interstate 90
Fatal crashes 2015–2024 193Deaths 214Counties 16Latest data year 2024
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. Latest data year: 2024. The route is the trafficway recorded for each crash (FARS TWAY_ID); the same route number in another state has its own page.
Interstate 90 in Montana was the trafficway in 193 fatal crashes between 2015 and 2024, in which 214 people died.
That is 10.4% of the 1,864 fatal crashes in Montana over the same years. The ten-year crash count fell 16% from 230 in 2005–2014 to 193 in 2015–2024.
The crashes were concentrated in Gallatin County (27), Missoula County (26) and Yellowstone County (22) and 13 other counties.
31.6% of the crashes had a driver reported as drinking (Montana: 43.9%) and 33.7% had a speeding-related driver (35.8%); pedestrians were 6.1% and motorcyclists 8.4% of those killed.
Fatal crashes per year
Route identification in FARS is consistent from 2000; earlier years are not shown. Shaded band: the ten-year window used for the shares below.
Compared with all fatal crashes in Montana
| Measure | Interstate 90 | Montana |
|---|---|---|
| Fatal crashes, 2015–2024 | 193 | 1,864 |
| Deaths, 2015–2024 | 214 | 2,046 |
| Deaths per fatal crash | 1.1 | 1.1 |
| Share of state fatal crashes | 10.4% | 100% |
| Change vs previous ten years | -16% | -8% |
Factor shares
Counties along the route
| # | County | Fatal crashes on I-90 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Gallatin County | 27 | 14% | 99 |
| 2 | Missoula County | 26 | 13% | 147 |
| 3 | Yellowstone County | 22 | 11% | 186 |
| 4 | Big Horn County | 21 | 11% | 109 |
| 5 | Mineral County | 17 | 9% | 24 |
| 6 | Jefferson County | 14 | 7% | 48 |
| 7 | Stillwater County | 12 | 6% | 27 |
| 8 | Sweet Grass County | 10 | 5% | 14 |
| 9 | Granite County | 9 | 5% | 21 |
| 10 | Park County | 9 | 5% | 44 |
| 11 | Powell County | 9 | 5% | 28 |
| 12 | Deer Lodge County | 6 | 3% | 20 |
| 13 | Silver Bow County | 6 | 3% | 34 |
| 14 | Broadwater County | 3 | 2% | 17 |
| 15 | Chouteau County | 1 | 1% | 20 |
| 16 | Dawson County | 1 | 1% | 16 |
Hour of day
Share of fatal crashes on Interstate 90 beginning in each hour, 2015–2024; tick marks the Montana share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 290–295 | 7 | 4% |
| Mile 105–110 | 5 | 3% |
| Mile 110–115 | 5 | 3% |
| Mile 295–300 | 5 | 3% |
| Mile 305–310 | 5 | 3% |
| Mile 405–410 | 5 | 3% |
Five-mile bins by FARS milepoint, the six with the most fatal crashes; 94.3% of crashes on the route have a milepoint. Milepoints are as recorded by the state and can restart at county or district lines.
Other routes in Montana
- US Route 93 116
- US Route 2 103
- US Route 87 64
- Interstate 15 61
- US Route 212 55
- State Route 200 45
- US Route 12 43
- US Route 89 35
- Interstate 94 31
- US Route 191 24
- State Route MT 23
All routes and counties in Montana
Questions and answers
How many fatal crashes have there been on Interstate 90 in Montana?
193 fatal crashes with 214 deaths over 2015–2024, per NHTSA's FARS. The route is the trafficway recorded for the crash; the same numbered route in another state has its own page.
Which counties along Interstate 90 had the most fatal crashes?
Gallatin County (27), Missoula County (26), Yellowstone County (22), Big Horn County (21) and Mineral County (17).
What share of crashes on Interstate 90 involved alcohol or speeding?
31.6% had a driver reported as drinking and 33.7% a speeding-related driver, against 43.9% and 35.8% for all fatal crashes in Montana.
When do fatal crashes happen on Interstate 90?
43.0% of the crashes were between 6pm and 6am. The hour chart on this page shows the full distribution.
Provenance
Source: NHTSA Fatality Analysis Reporting System, annual national CSV files 2000–2024 (accident, vehicle and person tables), public domain. Route pages are built for signed Interstate, US and state routes with at least 20 fatal crashes in 2015–2024. Data through 31 Dec 2024; generated 30 Sep 2026. See methodology and corrections.