In 2024, 753 people died in motor vehicle crashes in Mississippi, a state of about 2.9 million. That works out to 25.6 deaths per 100,000 residents, the highest rate in the country and more than twice the national figure of 11.5. Rhode Island, at the other end, recorded 4.7. A resident of Mississippi faced more than five times the risk of dying on the road that year as a resident of Rhode Island.
Those rates come from the Fatality Analysis Reporting System, the federal census of fatal crashes, as compiled by state in the Insurance Institute for Highway Safety’s annual tables. The national total for 2024 was 39,254 deaths. Which state counts as deadliest depends on which rate you pick, and the gap between the two rates says a lot about where and how people drive.
The ten highest death rates
| Rank | State | Deaths per 100,000 people | Deaths per 100 million miles | Deaths | Share in rural areas |
|---|---|---|---|---|---|
| 1 | Mississippi | 25.6 | 1.81 | 753 | 67% |
| 2 | Arkansas | 19.5 | 1.53 | 603 | 68% |
| 3 | New Mexico | 19.2 | 1.43 | 409 | 64% |
| 4 | South Carolina | 18.9 | 1.67 | 1,038 | 46% |
| 5 | Alabama | 18.7 | 1.32 | 962 | 59% |
| 6 | Wyoming | 18.2 | 1.10 | 107 | 75% |
| 7 | Montana | 18.1 | 1.49 | 206 | 79% |
| 8 | Tennessee | 16.6 | 1.52 | 1,197 | 40% |
| 9 | Louisiana | 16.4 | 1.36 | 752 | 45% |
| 10 | Arizona | 16.2 | 1.74 | 1,229 | 30% |
The list is almost entirely Southern and Mountain West. Eight of the ten record more than 40 percent of their deaths on rural roads, and five record more than 60 percent. Nationally, 41 percent of 2024 crash deaths happened in rural areas.
Per person or per mile
Deaths per 100,000 people answer the question a resident cares about: how likely am I to die on the road this year. Deaths per 100 million vehicle miles traveled answer a different one: how dangerous is each mile of driving. A state where people drive long distances can score badly on the first and reasonably on the second.
Wyoming shows the difference best. Its residents drive more miles per person than any other state’s, so its population rate of 18.2 ranks sixth. Per mile driven, its rate of 1.10 is below the national figure of 1.19, in the bottom half of states. Arizona moves the opposite way: tenth by population, second by mileage at 1.74. Most of Arizona’s deaths are urban, and its mileage rate suggests the risk lies in the roads and the driving on them more than in distance traveled.
Mississippi tops both lists. At 1.81 deaths per 100 million miles, its roads are about half again as deadly per mile as the national average.
At the safe end, the two rates mostly agree. Massachusetts has the lowest mileage rate at 0.59 and the second-lowest population rate at 5.1. Rhode Island and New York join it near the bottom on both measures. These are dense states where a large share of driving happens on urban roads at lower speeds, and only 8 percent of Massachusetts crash deaths occurred in rural areas.
Why rural roads weigh so heavily
FHWA’s travel table for 2024 puts rural roads at about 1.02 trillion of the 3.29 trillion vehicle miles driven nationwide, or 31 percent. Rural areas accounted for 41 percent of deaths. Per mile, that is roughly 1.56 deaths per 100 million rural miles against about 1.01 on urban roads.
Several things stack up on rural roads. Speeds are higher, and the energy in a crash rises with the square of speed. Many rural roads are two-lane with no median, so a driver who drifts across the centerline meets oncoming traffic head-on. Roadsides carry trees, steep slopes and ditches close to the travel lane. Emergency medical services usually have farther to travel, and so does the injured person on the way to a trauma center. Most of the nation’s road mileage is rural: 2.96 million of the 4.21 million miles of public road in FHWA’s 2024 count.
Across the 50 states, the population death rate tends to rise with the share of deaths in rural areas, though the relationship is loose. North Dakota, Maine, South Dakota and Montana each record about 80 percent of their deaths in rural areas. Of the four, only Montana makes the top ten, so rurality alone does not set a state’s rate. Road design, seat belt use, impairment and speed enforcement all move the number too. The engineering side of making rural roads more forgiving, from rumble strips to cable median barrier, is the subject of the guardrails and roadside design piece.
What the speeding column can and cannot show
The IIHS tables also report the share of each state’s deaths in crashes where speeding was recorded as a factor. Nationally the figure is 29 percent. Vermont reports 54 percent and Alaska 50, while Florida reports 11 and Kentucky 13.
That spread is too wide to reflect driving alone. The speeding flag in the federal file comes from the police crash report, so it depends on what officers record at the scene, and that varies by state and agency. The column is useful for tracking a single state over time and much weaker for comparing one state with another.
Reading the rates fairly
Population and mileage rates both have blind spots. Neither adjusts for the age of the vehicle fleet, the share of pickups and SUVs, or how many visitors drive through a state. A state on a major tourist or freight corridor carries deaths of non-residents in its count. Single-year rates for small states can swing on a few crashes: Wyoming’s 107 deaths are less than a tenth of Arizona’s.
The more durable finding is the one the per-mile rate reveals: risk depends heavily on the kind of road, and the roads with the highest risk per mile are the ones that get the least traffic and the thinnest budgets. That is where most of the policy argument in the road safety coverage ends up, and why the federal fatality file deserves a careful reading, covered in what the roadway fatality data shows. Every state’s figures, including pedestrian and motorcyclist counts, are in the sortable traffic deaths by state table.