Quick answer
According to crimebycity.com's analysis of NHTSA Fatality Analysis Reporting System data, O'fallon, MO recorded 1 traffic deaths in 1 fatal crashes from 2020 to 2024 — 0.2 deaths per 100,000 residents per year vs the US average of 12.3. Its Road Danger Score of 1/100 means a higher traffic-fatality rate than about 1% of ranked US cities (#55 of 55 in Missouri, most dangerous first).
Road Danger Score
Traffic Deaths per 100K
Fatal Crashes 2020–2024
How Dangerous Are the Roads in O'fallon, Missouri?
O'fallon has a Road Danger Score of 1/100 (Safer Roads Than Most Cities). Over the five years from 2020 to 2024, federal crash data recorded 1 fatal motor-vehicle crashes in the city, killing 1 people — 0.2 traffic deaths per 100,000 residents per year, below the national average of 12.3.
O'fallon ranks #55 out of 55 ranked cities in Missouri and #2,143 out of 2,153 nationally for road danger (most dangerous first). The score is a percentile: a higher traffic-fatality rate than about 1% of ranked US cities.
The most distinctive factor in O'fallon's fatal crashes: dark / nighttime conditions — 100% of fatal crashes, versus 50% nationally.
What’s Behind O'fallon’s Fatal Crashes (2020–2024)
Share of the city’s 1 fatal crashes where each factor was recorded. Factors overlap, so shares don’t sum to 100%.
| Crash Factor | Fatal Crashes | O'fallon | National Avg |
|---|---|---|---|
| Drinking driver involved | 0 | 0.0% | 25.9% |
| Speeding involved | 0 | 0.0% | 28.2% |
| Pedestrian or cyclist involved | 0 | 0.0% | 22.5% |
| Dark / nighttime conditions | 1 | 100.0% | 49.8% |
O'fallon Traffic Deaths by Year
Annual traffic fatalities in O'fallon, Missouri from NHTSA FARS. Single-year swings are normal in smaller cities; the Road Danger Score uses the full 5-year window.
| Year | Traffic Deaths |
|---|---|
| 2024 | 0 |
| 2023 | 0 |
| 2022 | 0 |
| 2021 | 0 |
| 2020 | 1 |
Frequently Asked Questions
How many fatal car accidents happen in O'fallon, Missouri?
According to NHTSA FARS data, O'fallon recorded 1 fatal car accidents between 2020 and 2024, resulting in 1 traffic deaths — an average of 0.2 deaths per year.
How dangerous are the roads in O'fallon?
O'fallon has a Road Danger Score of 1/100, meaning its traffic-fatality rate is higher than about 1% of ranked US cities. The city averages 0.2 traffic deaths per 100,000 residents per year, compared to the US average of 12.3.
What causes fatal car accidents in O'fallon?
Of O'fallon's fatal crashes in 2020–2024, 0% involved a drinking driver, 0% involved speeding, 0% involved a pedestrian or cyclist, and 100% happened in dark conditions.
How many people die in car accidents in O'fallon each year?
An average of 0.2 people per year died in car accidents in O'fallon across 2020–2024 (1 total), based on the federal Fatality Analysis Reporting System.
Is driving in O'fallon more dangerous than in other Missouri cities?
O'fallon ranks #55 of 55 ranked Missouri cities for road danger (most dangerous first) and #2,143 of 2,153 nationally.