Quick answer
According to crimebycity.com's analysis of NHTSA Fatality Analysis Reporting System data, Naperville, IL recorded 22 traffic deaths in 21 fatal crashes over the most recent five-year period — 2.9 deaths per 100,000 residents per year vs the US average of 12.3. Its Road Danger Score of 11/100 means a higher traffic-fatality rate than about 11% of ranked US cities (#132 of 147 in Illinois, most dangerous first).
Road Danger Score
Traffic Deaths per 100K
Fatal Crashes (5-Yr Total)
How Dangerous Are the Roads in Naperville, Illinois?
Naperville has a Road Danger Score of 11/100 (Safer Roads Than Most Cities). Over the most recent five-year period, federal crash data recorded 21 fatal motor-vehicle crashes in the city, killing 22 people — 2.9 traffic deaths per 100,000 residents per year, below the national average of 12.3.
Naperville ranks #132 out of 147 ranked cities in Illinois and #1,925 out of 2,153 nationally for road danger (most dangerous first). The score is a percentile: a higher traffic-fatality rate than about 11% of ranked US cities.
The most distinctive factor in Naperville's fatal crashes: speeding involved — 48% of fatal crashes, versus 28% nationally.
Traffic deaths in Naperville rose 50% comparing the first two years of the period with the most recent two years.
What’s Behind Naperville’s Fatal Crashes
Share of the city’s 21 fatal crashes where each factor was recorded. Factors overlap, so shares don’t sum to 100%.
| Crash Factor | Fatal Crashes | Naperville | National Avg |
|---|---|---|---|
| Drinking driver involved | 5 | 23.8% | 25.9% |
| Speeding involved | 10 | 47.6% | 28.2% |
| Pedestrian or cyclist involved | 4 | 19.0% | 22.5% |
| Dark / nighttime conditions | 6 | 28.6% | 49.8% |
Naperville Traffic Deaths by Year
Annual traffic fatalities in Naperville, Illinois 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 | 9 |
| 2023 | 3 |
| 2022 | 2 |
| 2021 | 5 |
| 2020 | 3 |
Frequently Asked Questions
What are the car accident statistics for Naperville, Illinois?
According to NHTSA FARS data, Naperville recorded 21 fatal car accidents over the most recent five-year period, resulting in 22 traffic deaths — an average of 4.4 deaths per year.
How dangerous are the roads in Naperville?
Naperville has a Road Danger Score of 11/100, meaning its traffic-fatality rate is higher than about 11% of ranked US cities. The city averages 2.9 traffic deaths per 100,000 residents per year, compared to the US average of 12.3.
What causes fatal car accidents in Naperville?
Of Naperville's fatal crashes over the most recent five-year period, 24% involved a drinking driver, 48% involved speeding, 19% involved a pedestrian or cyclist, and 29% happened in dark conditions.
How many people die in car accidents in Naperville each year?
An average of 4.4 people per year died in car accidents in Naperville over the most recent five-year period (22 total), based on the federal Fatality Analysis Reporting System.
Is driving in Naperville more dangerous than in other Illinois cities?
Naperville ranks #132 of 147 ranked Illinois cities for road danger (most dangerous first) and #1,925 of 2,153 nationally.