Fatal crashes in Suffolk County, New York
In 2024, 120 people died in 110 fatal crashes in Suffolk County, New York, 24.1% fewer than in 2023. From 2015 to 2024 the county recorded 1,287 fatal crashes and 1,389 deaths, the most of any county in New York.
7.8 deaths per 100,000 residents, against 5.5 across New York in 2024; 9.2 against 5.4 a year over 2015 to 2024. Population 1,535,909, Census Bureau estimate. All fatal crashes in New York.
Deaths in Suffolk County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 110 | 120 |
| 2023 | 146 | 158 |
| 2022 | 154 | 164 |
| 2021 | 142 | 153 |
| 2020 | 108 | 113 |
| 2019 | 108 | 115 |
| 2018 | 126 | 137 |
| 2017 | 113 | 122 |
| 2016 | 122 | 139 |
| 2015 | 158 | 168 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in Suffolk County
State Highway 27 had the most fatal crashes of any numbered road in Suffolk County from 2015 to 2024: 90, with 95 deaths. The 15 roads listed held 37% of all fatal crashes in Suffolk County from 2015 to 2024; 1 is an interstate, 14 state highways. 40% of the county's fatal crashes were on an interstate, US or state route; the other 60% were on county roads and city streets. Routes are listed from 5 fatal crashes.
| Road | Fatal crashes | Deaths | 2022 to 2024 | ||
|---|---|---|---|---|---|
| 1 | State Highway 27 | 90 | 95 | 31 | |
| 2 | State Highway 25 | 87 | 98 | 32 | |
| 3 | I-495 | 46 | 53 | 20 | |
| 4 | State Highway 25A | 38 | 41 | 8 | |
| 5 | State Highway 908M | 36 | 45 | 17 | |
| 6 | State Highway 110 | 29 | 29 | 11 | no page |
| 7 | State Highway 454 | 25 | 27 | 12 | no page |
| 8 | State Highway 112 | 25 | 25 | 7 | no page |
| 9 | State Highway 27A | 23 | 24 | 5 | no page |
| 10 | State Highway 347 | 21 | 21 | 10 | no page |
| 11 | State Highway 109 | 13 | 14 | 6 | no page |
| 12 | State Highway 111 | 13 | 14 | 4 | no page |
| 13 | State Highway 24 | 13 | 13 | 5 | |
| 14 | State Highway 908K | 13 | 13 | 5 | no page |
| 15 | State Highway 908G | 10 | 12 | 2 | no page |
Brookhaven had 22% of the county's fatal crashes from 2015 to 2024, 283 of 1,287.
Cities NHTSA filed, with their fatal crashes from 2015 to 2024: Brookhaven 283, Islip 232, Babylon 136, Huntington 101, Southampton 63, Smithtown 62, Riverhead 41, Southold 16. 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 Suffolk County
The heaviest slot is Saturday, 8 pm to midnight, with 66 fatal crashes from 2015 to 2024. The worst hour is 8 pm to 9 pm; the worst month is September.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 4.1 percent, 53 fatal crashes | 2.1 percent, 27 fatal crashes | 1.5 percent, 19 fatal crashes | 2.0 percent, 26 fatal crashes | 3.0 percent, 38 fatal crashes | 3.3 percent, 43 fatal crashes |
| Mon | 2.1 percent, 27 fatal crashes | 1.9 percent, 24 fatal crashes | 1.4 percent, 18 fatal crashes | 2.3 percent, 29 fatal crashes | 2.6 percent, 34 fatal crashes | 3.6 percent, 46 fatal crashes |
| Tue | 1.3 percent, 17 fatal crashes | 1.7 percent, 22 fatal crashes | 1.6 percent, 21 fatal crashes | 1.8 percent, 23 fatal crashes | 2.9 percent, 37 fatal crashes | 3.0 percent, 38 fatal crashes |
| Wed | 1.2 percent, 16 fatal crashes | 1.4 percent, 18 fatal crashes | 1.8 percent, 23 fatal crashes | 1.9 percent, 24 fatal crashes | 2.9 percent, 37 fatal crashes | 3.8 percent, 49 fatal crashes |
| Thu | 1.3 percent, 17 fatal crashes | 1.8 percent, 23 fatal crashes | 1.7 percent, 22 fatal crashes | 2.0 percent, 26 fatal crashes | 2.7 percent, 35 fatal crashes | 2.9 percent, 37 fatal crashes |
| Fri | 1.9 percent, 24 fatal crashes | 1.5 percent, 19 fatal crashes | 1.9 percent, 24 fatal crashes | 1.9 percent, 25 fatal crashes | 4.3 percent, 55 fatal crashes | 3.4 percent, 44 fatal crashes |
| Sat | 3.3 percent, 42 fatal crashes | 2.6 percent, 33 fatal crashes | 1.2 percent, 16 fatal crashes | 2.6 percent, 34 fatal crashes | 2.6 percent, 34 fatal crashes | 5.1 percent, 66 fatal crashes |
By hour
By month
- Jan7.9%
- Feb6.8%
- Mar6.9%
- Apr6.8%
- May8.2%
- Jun7.2%
- Jul10.0%
- Aug8.5%
- Sep11.3%
- Oct9.9%
- Nov7.8%
- Dec8.6%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in Suffolk County first hit
The first harmful event was a collision with another vehicle in 33%; a pedestrian in 30%, a fixed object such as a tree, pole or barrier in 26%, a cyclist in 4.2%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 419 | 33% |
| Pedestrian | 386 | 30% |
| Fixed object (tree, pole, barrier, ditch) | 332 | 26% |
| Cyclist | 54 | 4.2% |
| Other | 40 | 3.1% |
| Rollover | 28 | 2.2% |
| Parked vehicle | 28 | 2.2% |
| 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 Suffolk County compare with New York
The largest difference from New York: from 2015 to 2024, 8.9% of fatal crashes in Suffolk County were on rural roads, against 30% across New York. Also above the New York share: unbelted occupants and pedestrians. Below it: unlit roads at night, speeding, distracted drivers and motorcycles. Shares of fatal crashes from 2015 to 2024, against the share across all of New York. A share is only given over 20 crashes; above or below means more than chance would give on 1,287 crashes.
| Suffolk | New York | ||
|---|---|---|---|
| On rural roads | 8.9% | 30% | below the New York share |
| At or near an intersection | 36% | 34% | about the same as the New York share |
| In the dark, road unlit | 14% | 17% | below the New York share |
| A drinking driver | 22% | 20% | about the same as the New York share |
| Speeding | 27% | 31% | below the New York share |
| A distracted driver (as recorded) | 10% | 12% | below the New York share |
| Occupants killed unbelted | 41% | 37% | above the New York share |
| Hit-and-run | 8.5% | 8.2% | about the same as the New York share |
| A motorcycle involved | 14% | 18% | below the New York share |
| Pedestrians among the dead | 30% | 26% | above the New York 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 Suffolk County, New York
- How many people died in car accidents in Suffolk County in 2024?
- 120 people died in 110 fatal crashes in Suffolk County, New York, in 2024, 24.1% fewer than in 2023. That is 7.8 deaths per 100,000 residents, against 5.5 across New York. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in Suffolk County?
- State Highway 27 had the most fatal crashes of any numbered road in Suffolk County from 2015 to 2024: 90, with 95 deaths.
- When do fatal crashes in Suffolk County happen most often?
- The heaviest slot from 2015 to 2024 was Saturday, 8 pm to midnight, with 66 fatal crashes.
- How many fatal crashes in Suffolk County involved a drinking driver?
- 281 of 1,287 fatal crashes in Suffolk County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 22%, against 20% across New York.
Other counties in New York with a page
- Nassau County
- Queens County
- Kings County
- Erie County
- Monroe County
- Bronx County
- New York County
- Westchester County
- Orange County
- Onondaga County
- Dutchess County
- Albany County
All fatal crashes in New York, with every county ranked.
Where the Suffolk County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in Suffolk County (county code 103). 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-york/suffolk-county/, from NHTSA FARS (2024 Annual Report File).”