Fatal crashes in Mercer County, New Jersey
In 2024, 36 people died in 35 fatal crashes in Mercer County, New Jersey, 28.6% more than in 2023. From 2015 to 2024 the county recorded 259 fatal crashes and 266 deaths, the 11th most of 21 counties in New Jersey.
9.2 deaths per 100,000 residents, against 7.1 across New Jersey in 2024; 7.1 against 6.7 a year over 2015 to 2024. Population 392,138, Census Bureau estimate. All fatal crashes in New Jersey.
Deaths in Mercer County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 35 | 36 |
| 2023 | 28 | 28 |
| 2022 | 26 | 26 |
| 2021 | 36 | 39 |
| 2020 | 20 | 21 |
| 2019 | 21 | 21 |
| 2018 | 28 | 29 |
| 2017 | 26 | 26 |
| 2016 | 21 | 21 |
| 2015 | 18 | 19 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in Mercer County
I-95 had the most fatal crashes of any numbered road in Mercer County from 2015 to 2024: 23, with 25 deaths. The 10 roads listed held 54% of all fatal crashes in Mercer County from 2015 to 2024; 3 are interstates, 3 US routes, 4 state highways. 56% of the county's fatal crashes were on an interstate, US or state route; the other 44% were on county roads and city streets. Routes are listed from 5 fatal crashes.
| Road | Fatal crashes | Deaths | 2022 to 2024 | ||
|---|---|---|---|---|---|
| 1 | I-95 | 23 | 25 | 9 | |
| 2 | US 1 | 22 | 22 | 6 | |
| 3 | State Highway 33 | 19 | 19 | 3 | no page |
| 4 | State Highway 29 | 15 | 16 | 5 | no page |
| 5 | I-295 | 14 | 14 | 5 | |
| 6 | State Highway 129 | 14 | 14 | 4 | no page |
| 7 | US 130 | 11 | 11 | 4 | |
| 8 | I-195 | 9 | 9 | 4 | no page |
| 9 | US 206 | 7 | 7 | 2 | |
| 10 | State Highway 31 | 6 | 8 | 2 | no page |
Trenton had 27% of the county's fatal crashes from 2015 to 2024, 71 of 259.
Cities NHTSA filed, with their fatal crashes from 2015 to 2024: Trenton 71, Hamilton Township 55, West Windsor 17, Lawrenceville 16, East Windsor 16, Robbinsville 13, Ewing Township 11, Princeton 6. The city is not filed for crashes outside a city.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen in Mercer County
The heaviest slot is Sunday, 8 pm to midnight, with 13 fatal crashes from 2015 to 2024. The worst hour is 8 pm to 9 pm; the worst month is October.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 2.7 percent, 7 fatal crashes | 1.5 percent, 4 fatal crashes | 1.2 percent, 3 fatal crashes | 1.9 percent, 5 fatal crashes | 3.5 percent, 9 fatal crashes | 5.0 percent, 13 fatal crashes |
| Mon | 1.9 percent, 5 fatal crashes | 1.5 percent, 4 fatal crashes | 0.8 percent, 2 fatal crashes | 2.3 percent, 6 fatal crashes | 3.9 percent, 10 fatal crashes | 3.9 percent, 10 fatal crashes |
| Tue | 2.3 percent, 6 fatal crashes | 1.5 percent, 4 fatal crashes | 0.8 percent, 2 fatal crashes | 4.6 percent, 12 fatal crashes | 2.7 percent, 7 fatal crashes | 1.9 percent, 5 fatal crashes |
| Wed | 2.3 percent, 6 fatal crashes | 1.5 percent, 4 fatal crashes | 1.9 percent, 5 fatal crashes | 1.9 percent, 5 fatal crashes | 3.5 percent, 9 fatal crashes | 3.5 percent, 9 fatal crashes |
| Thu | 1.9 percent, 5 fatal crashes | 1.5 percent, 4 fatal crashes | 1.5 percent, 4 fatal crashes | 2.3 percent, 6 fatal crashes | 4.6 percent, 12 fatal crashes | 3.9 percent, 10 fatal crashes |
| Fri | 0.8 percent, 2 fatal crashes | 1.9 percent, 5 fatal crashes | 0.4 percent, 1 fatal crash | 0.8 percent, 2 fatal crashes | 1.9 percent, 5 fatal crashes | 4.2 percent, 11 fatal crashes |
| Sat | 3.9 percent, 10 fatal crashes | 2.3 percent, 6 fatal crashes | 1.5 percent, 4 fatal crashes | 1.9 percent, 5 fatal crashes | 1.5 percent, 4 fatal crashes | 4.2 percent, 11 fatal crashes |
By hour
By month
- Jan6.9%
- Feb5.0%
- Mar9.3%
- Apr5.8%
- May6.6%
- Jun8.9%
- Jul8.5%
- Aug10.4%
- Sep8.9%
- Oct12.7%
- Nov7.7%
- Dec9.3%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in Mercer County first hit
The first harmful event was a pedestrian in 33%; a collision with another vehicle in 30%, a fixed object such as a tree, pole or barrier in 22%, a cyclist in 5.0%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Pedestrian | 85 | 33% |
| Collision with another vehicle | 78 | 30% |
| Fixed object (tree, pole, barrier, ditch) | 56 | 22% |
| Other | 15 | 5.8% |
| Cyclist | 13 | 5.0% |
| Parked vehicle | 8 | 3.1% |
| Rollover | 4 | 1.5% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes in Mercer County compare with New Jersey
The largest difference from New Jersey: from 2015 to 2024, 3.5% of fatal crashes in Mercer County were on rural roads, against 11% across New Jersey. Also above the New Jersey share: unlit roads at night, hit-and-runs and pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of New Jersey. A share is only given over 20 crashes; above or below means more than chance would give on 259 crashes.
| Mercer | New Jersey | ||
|---|---|---|---|
| On rural roads | 3.5% | 11% | below the New Jersey share |
| At or near an intersection | 34% | 34% | about the same as the New Jersey share |
| In the dark, road unlit | 23% | 18% | above the New Jersey share |
| A drinking driver | 22% | 22% | about the same as the New Jersey share |
| Speeding | 26% | 23% | about the same as the New Jersey share |
| A distracted driver (as recorded) | 24% | 26% | about the same as the New Jersey share |
| Occupants killed unbelted | 44% | 45% | about the same as the New Jersey share |
| Hit-and-run | 13% | 8.7% | above the New Jersey share |
| A motorcycle involved | 11% | 14% | about the same as the New Jersey share |
| Pedestrians among the dead | 35% | 29% | above the New Jersey share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes in Mercer County, New Jersey
- How many people died in car accidents in Mercer County in 2024?
- 36 people died in 35 fatal crashes in Mercer County, New Jersey, in 2024, 28.6% more than in 2023. That is 9.2 deaths per 100,000 residents, against 7.1 across New Jersey. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in Mercer County?
- I-95 had the most fatal crashes of any numbered road in Mercer County from 2015 to 2024: 23, with 25 deaths.
- When do fatal crashes in Mercer County happen most often?
- The heaviest slot from 2015 to 2024 was Sunday, 8 pm to midnight, with 13 fatal crashes.
- How many fatal crashes in Mercer County involved a drinking driver?
- 56 of 259 fatal crashes in Mercer County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 22%, against 22% across New Jersey.
Other counties in New Jersey with a page
- Middlesex County
- Essex County
- Camden County
- Burlington County
- Ocean County
- Monmouth County
- Atlantic County
- Bergen County
- Gloucester County
- Union County
- Passaic County
- Cumberland County
All fatal crashes in New Jersey, with every county ranked.
Where the Mercer County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in Mercer County (county code 21). A fatal crash is one in which someone died within 30 days. The rate per 100,000 uses the Census Bureau's population estimate for the county; it is the only figure here not counted from FARS. Totals from state highway departments and news reports can differ: they count from their own crash reports, often before every death within 30 days is known, while NHTSA's file is checked against death certificates and revised once a year. The full method.
Download every county with a page as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/fatal-crashes/new-jersey/mercer-county/, from NHTSA FARS (2024 Annual Report File).”