Quick answer
According to crimebycity.com's analysis of NHTSA Fatality Analysis Reporting System data, Ontario, CA recorded 114 traffic deaths in 108 fatal crashes from 2020 to 2024 — 12.3 deaths per 100,000 residents per year vs the US average of 12.3. Its Road Danger Score of 76/100 means a higher traffic-fatality rate than about 76% of ranked US cities (#28 of 220 in California, most dangerous first).
Road Danger Score
Traffic Deaths per 100K
Fatal Crashes 2020–2024
How Dangerous Are the Roads in Ontario, California?
Ontario has a Road Danger Score of 76/100 (Above-Average Road Danger). Over the five years from 2020 to 2024, federal crash data recorded 108 fatal motor-vehicle crashes in the city, killing 114 people — 12.3 traffic deaths per 100,000 residents per year, above the national average of 12.3.
Ontario ranks #28 out of 220 ranked cities in California and #512 out of 2,153 nationally for road danger (most dangerous first). The score is a percentile: a higher traffic-fatality rate than about 76% of ranked US cities.
The most distinctive factor in Ontario's fatal crashes: dark / nighttime conditions — 68% of fatal crashes, versus 50% nationally.
Traffic deaths in Ontario fell 10% comparing 2020–2021 with 2023–2024.
What’s Behind Ontario’s Fatal Crashes (2020–2024)
Share of the city’s 108 fatal crashes where each factor was recorded. Factors overlap, so shares don’t sum to 100%.
| Crash Factor | Fatal Crashes | Ontario | National Avg |
|---|---|---|---|
| Drinking driver involved | 37 | 34.3% | 25.9% |
| Speeding involved | 46 | 42.6% | 28.2% |
| Pedestrian or cyclist involved | 37 | 34.3% | 22.5% |
| Dark / nighttime conditions | 73 | 67.6% | 49.8% |
Ontario Traffic Deaths by Year
Annual traffic fatalities in Ontario, California 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 | 24 |
| 2023 | 21 |
| 2022 | 19 |
| 2021 | 29 |
| 2020 | 21 |
Frequently Asked Questions
How many fatal car accidents happen in Ontario, California?
According to NHTSA FARS data, Ontario recorded 108 fatal car accidents between 2020 and 2024, resulting in 114 traffic deaths — an average of 22.8 deaths per year.
How dangerous are the roads in Ontario?
Ontario has a Road Danger Score of 76/100, meaning its traffic-fatality rate is higher than about 76% of ranked US cities. The city averages 12.3 traffic deaths per 100,000 residents per year, compared to the US average of 12.3.
What causes fatal car accidents in Ontario?
Of Ontario's fatal crashes in 2020–2024, 34% involved a drinking driver, 43% involved speeding, 34% involved a pedestrian or cyclist, and 68% happened in dark conditions.
How many people die in car accidents in Ontario each year?
An average of 22.8 people per year died in car accidents in Ontario across 2020–2024 (114 total), based on the federal Fatality Analysis Reporting System.
Is driving in Ontario more dangerous than in other California cities?
Ontario ranks #28 of 220 ranked California cities for road danger (most dangerous first) and #512 of 2,153 nationally.