NHTSA FARS 2020–2024 · Census population
Most Dangerous Counties in Montana
Quick answer: Yellowstone County recorded the most road deaths in Montana from 2020 to 2024 (115), while Big Horn County had the highest death rate, 100.8 per 100,000 residents a year against 19.4 for the state as a whole.
Per 100,000 residents a year · counties with 10,000+ people
Highest death rate
| # | County | Deaths per 100k / year | Deaths 2020–2024 | Population |
|---|---|---|---|---|
| 1 | Big Horn County | 100.8 | 65 | 12,891 |
| 2 | Jefferson County | 59.5 | 38 | 12,774 |
| 3 | Glacier County | 42.5 | 29 | 13,637 |
| 4 | Carbon County | 39.6 | 22 | 11,116 |
| 5 | Sanders County | 34.6 | 23 | 13,285 |
| 6 | Park County | 31.6 | 28 | 17,710 |
| 7 | Lake County | 29.5 | 48 | 32,561 |
| 8 | Roosevelt County | 24.7 | 13 | 10,526 |
| 9 | Lincoln County | 24.6 | 26 | 21,175 |
| 10 | Flathead County | 19.5 | 108 | 110,695 |
| 11 | Missoula County | 15.9 | 96 | 120,672 |
| 12 | Fergus County | 15.4 | 9 | 11,687 |
| 13 | Cascade County | 13.7 | 58 | 84,606 |
| 14 | Yellowstone County | 13.6 | 115 | 168,957 |
| 15 | Ravalli County | 12 | 28 | 46,727 |
53 counties · click a heading to sort
Every county in Montana
| County | Deaths | Fatal crashes | Per 100k / yr | Pedestrians | At night | Alcohol | 2020→2024 | Deadliest roads |
|---|---|---|---|---|---|---|---|---|
| Yellowstone County | 115 | 103 | 13.6 | 9% | 51% | 45% | I-90, US-87, I-94 | |
| Flathead County | 108 | 104 | 19.5 | 11% | 43% | 47% | US-2, US-93, SR-35 | |
| Missoula County | 96 | 84 | 15.9 | 19% | 52% | 37% | US-93, I-90, SR-83 | |
| Big Horn County | 65 | 54 | 100.8 | 11% | 48% | 35% | I-90, US-212, US-87 | |
| Gallatin County | 63 | 56 | 10.2 | 6% | 34% | 38% | I-90, US-191, I-90W | |
| Cascade County | 58 | 52 | 13.7 | 5% | 44% | 37% | I-15, US-89, US-87 | |
| Lake County | 48 | 46 | 29.5 | 10% | 46% | 50% | US-93, SR-35, SR-83 | |
| Jefferson County | 38 | 35 | 59.5 | 0% | 40% | 43% | I-90, I-15, SR-69 | |
| Lewis and Clark County | 34 | 34 | 9.3 | 18% | 38% | 29% | I-15, SR-200, US-12 | |
| Glacier County | 29 | 23 | 42.5 | 7% | 61% | 74% | US-2, US-89, SR-49 | |
| Park County | 28 | 25 | 31.6 | 0% | 24% | 64% | US-89, I-90, US-212 | |
| Ravalli County | 28 | 27 | 12 | 0% | 37% | 30% | US-93, SR-269, SR-203 | |
| Lincoln County | 26 | 25 | 24.6 | 4% | 36% | 36% | US-2, SR-56, US-93 | |
| Rosebud County | 23 | 21 | 56.3 | 4% | 62% | 33% | US-212, I-94, SR-39 | |
| Sanders County | 23 | 22 | 34.6 | 0% | 50% | 64% | SR-200, SR-28, SR-135 | |
| Carbon County | 22 | 21 | 39.6 | 9% | 29% | 52% | US-212, US-310, SR-72 | |
| Beaverhead County | 18 | 16 | 37.1 | 0% | 31% | 44% | I-15, SR-43, SR-41 | |
| Powell County | 17 | 16 | 48.2 | 6% | 12% | 50% | I-90, SR-200, US-12 | |
| Stillwater County | 17 | 15 | 37 | 12% | 40% | 47% | I-90, SR-78, US-10 | |
| Silver Bow County | 14 | 14 | 7.8 | 29% | 29% | 36% | SR-2, I-15, I-90 | |
| Granite County | 13 | 13 | 75.1 | 0% | 38% | 38% | I-90, SR-1 | |
| Roosevelt County | 13 | 13 | 24.7 | 0% | 77% | 85% | US-2, SR-25, SR-13 | |
| Pondera County | 13 | 11 | 43.1 | 0% | 9% | 45% | I-15, SR-44, SR-219 | |
| Chouteau County | 12 | 8 | 40.6 | 0% | 38% | 62% | US-87 | |
| Broadwater County | 11 | 9 | 28.7 | 9% | 44% | 44% | US-12, US-287, I-90 | |
| Musselshell County | 11 | 9 | 42.8 | 0% | 11% | 33% | US-87, US-12 | |
| Valley County | 11 | 8 | 29.3 | 0% | 38% | 50% | US-2, SR-42 | |
| Madison County | 9 | 9 | 19.5 | 11% | 22% | 0% | US-287, I-15, SR-87 | |
| Fergus County | 9 | 9 | 15.4 | 0% | 44% | 56% | US-87, US-191 | |
| Sweet Grass County | 9 | 9 | 48.4 | 0% | 22% | 56% | I-90 | |
| Deer Lodge County | 9 | 9 | 18.8 | 11% | 22% | 22% | I-90, SR-48 | |
| Blaine County | 8 | 8 | 23 | 12% | 75% | 75% | US-2, SR-66 | |
| Judith Basin County | 8 | 5 | 77.2 | 0% | 0% | 40% | US-87 | |
| Mineral County | 8 | 8 | 32.3 | 0% | 25% | 38% | I-90, I-90W, SR-135 | |
| Custer County | 7 | 7 | 11.7 | 0% | 14% | 43% | I-94, SR-59, SR-489 | |
| Powder River County | 6 | 5 | 69.8 | 0% | 40% | 40% | US-212 | |
| Hill County | 6 | 6 | 7.4 | 0% | 0% | 33% | US-2, US-87 | |
| Phillips County | 6 | 6 | 28.4 | 0% | 67% | 67% | US-191, US-2 | |
| Golden Valley County | 5 | 5 | 118.9 | 0% | 40% | 40% | US-12 | |
| Meagher County | 5 | 5 | 49.8 | 0% | 20% | 60% | US-12, US-89 | |
| Dawson County | 4 | 4 | 9.1 | 25% | 75% | 25% | I-94, I-90 | |
| Garfield County | 4 | 4 | 66.7 | 0% | 25% | 50% | SR-200 | |
| McCone County | 3 | 3 | 35.1 | 0% | 67% | 67% | SR-200 | |
| Richland County | 3 | 3 | 5.3 | 0% | 100% | 67% | SR-23 | |
| Teton County | 3 | 3 | 9.4 | 0% | 67% | 100% | I-15 | |
| Treasure County | 3 | 3 | 79.3 | 0% | 33% | 67% | I-94 | |
| Carter County | 3 | 3 | 42.7 | 0% | 67% | 67% | US-212 | |
| Daniels County | 2 | 2 | 24.3 | 0% | 0% | 0% | SR-5 | |
| Prairie County | 2 | 2 | 36.2 | 0% | 50% | 0% | ||
| Sheridan County | 2 | 2 | 11.4 | 0% | 50% | 50% | ||
| Wheatland County | 1 | 1 | 9.7 | 0% | 0% | 0% | US-191 | |
| Toole County | 1 | 1 | 4 | 0% | 100% | 0% | I-15 | |
| Liberty County | 1 | 1 | 10.2 | 0% | 0% | 0% |
Deaths = people killed in crashes in the county, 2020–2024. Pedestrians = share of deaths who were on foot. At night = share of fatal crashes in the dark. Alcohol = share of fatal crashes where police reported a driver had been drinking. Rate = yearly average deaths ÷ average population × 100,000. Source: NHTSA FARS, U.S. Census Bureau.
More for Montana: deadliest highways and roads · Montana accidents today · get a police report · every state
Questions
Dangerous counties — FAQ
What is the most dangerous county in Montana for driving?
Yellowstone County recorded the most road deaths in Montana from 2020 to 2024 (115), while Big Horn County had the highest death rate, 100.8 per 100,000 residents a year against 19.4 for the state as a whole. Big counties lead on counts because more people drive there; the rate shows the risk for each resident.
How many people died on Montana roads from 2020 to 2024?
1,081 people, according to NHTSA's Fatality Analysis Reporting System, about 216 a year.
Where does this ranking come from?
Every fatal crash in NHTSA's FARS census for 2020–2024, placed in the county where it happened, divided by the county's average population from the U.S. Census Bureau. Rates are only ranked for counties with at least 10,000 residents.