Quick answer
According to crimebycity.com's analysis of NHTSA data, South Dakota recorded 712 traffic deaths in 646 fatal crashes from 2020 to 2024 — 15.7 per 100,000 residents per year, ranking #14 of 50 states (most dangerous first); the US average is 12.3.
Traffic Deaths 2020–2024
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 (2020–2024) | 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 from 2020 to 2024, 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 in 2020–2024, 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.