Quick answer
According to crimebycity.com's analysis of NHTSA data, South Dakota recorded 712 traffic deaths in 646 fatal crashes over the most recent five-year period — 15.7 per 100,000 residents per year, ranking #14 of 50 states (most dangerous first); the US average is 12.3.
Traffic Deaths (5-Yr Total)
Deaths per 100K per Year
State Rank
South Dakota Traffic Deaths by Year
The Most Dangerous South Dakota Cities to Drive In
All 4 ranked South Dakota cities by Road Danger Score (5-year traffic deaths per 100,000 residents, most dangerous first).
| # | City | Danger Score | Deaths (5-Yr) | Deaths per 100K/yr |
|---|---|---|---|---|
| 1 | Spearfish | 56/100 | 6 | 8.8 |
| 2 | Rapid City | 56/100 | 35 | 8.6 |
| 3 | Sioux Falls | 33/100 | 60 | 5.7 |
| 4 | Aberdeen | 7/100 | 3 | 2.1 |
Frequently Asked Questions
How many car accidents happen in South Dakota?
NHTSA's Fatality Analysis Reporting System recorded 646 fatal car accidents in South Dakota over the most recent five-year period, killing 712 people — an average of 142 traffic deaths per year.
How dangerous are South Dakota roads compared to other states?
South Dakota averages 15.7 traffic deaths per 100,000 residents per year, ranking #14 of 50 states (most dangerous first). The US average is 12.3 per 100,000.
What causes fatal car accidents in South Dakota?
Of South Dakota's fatal crashes over the most recent five-year period, 34% involved a drinking driver, 26% involved speeding, and 37% happened in dark conditions.
Which South Dakota city is the most dangerous to drive in?
Among ranked South Dakota cities, Spearfish has the highest Road Danger Score (56/100) at 8.8 traffic deaths per 100,000 residents per year.