Fatal crashes in St. Mary's County, Maryland
In 2024, 13 people died in 12 fatal crashes in St. Mary's County, Maryland, the same as in 2023. From 2015 to 2024 the county recorded 132 fatal crashes and 141 deaths, the 13th most of 24 counties in Maryland.
11.2 deaths per 100,000 residents, against 9.2 across Maryland in 2024; 12.4 against 9.1 a year over 2015 to 2024. Population 116,469, Census Bureau estimate. All fatal crashes in Maryland.
Deaths in St. Mary's County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 12 | 13 |
| 2023 | 13 | 13 |
| 2022 | 8 | 9 |
| 2021 | 17 | 20 |
| 2020 | 14 | 14 |
| 2019 | 15 | 15 |
| 2018 | 14 | 14 |
| 2017 | 16 | 19 |
| 2016 | 12 | 12 |
| 2015 | 11 | 12 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in St. Mary's County
State Highway 235 had the most fatal crashes of any numbered road in St. Mary's County from 2015 to 2024: 28, with 32 deaths. The 6 roads listed held 63% of all fatal crashes in St. Mary's County from 2015 to 2024; 6 state highways. 78% of the county's fatal crashes were on an interstate, US or state route; the other 22% were on county roads and city streets. Routes are listed from 5 fatal crashes.
| Road | Fatal crashes | Deaths | 2022 to 2024 | ||
|---|---|---|---|---|---|
| 1 | State Highway 235 | 28 | 32 | 6 | no page |
| 2 | State Highway 5 | 26 | 28 | 7 | |
| 3 | State Highway 4 | 11 | 11 | 2 | |
| 4 | State Highway 234 | 8 | 8 | 2 | no page |
| 5 | State Highway 246 | 5 | 5 | 2 | no page |
| 6 | State Highway 249 | 5 | 5 | 1 | no page |
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 St. Mary's County
The heaviest slot is Sunday, midnight to 4 am (the night from Saturday), with 10 fatal crashes from 2015 to 2024. The worst hour is 1 am to 2 am; the worst month is August.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 7.6 percent, 10 fatal crashes | 0.0 percent, 0 fatal crashes | 1.5 percent, 2 fatal crashes | 3.0 percent, 4 fatal crashes | 4.5 percent, 6 fatal crashes | 3.8 percent, 5 fatal crashes |
| Mon | 0.8 percent, 1 fatal crash | 3.0 percent, 4 fatal crashes | 2.3 percent, 3 fatal crashes | 2.3 percent, 3 fatal crashes | 2.3 percent, 3 fatal crashes | 3.8 percent, 5 fatal crashes |
| Tue | 0.8 percent, 1 fatal crash | 1.5 percent, 2 fatal crashes | 3.8 percent, 5 fatal crashes | 3.0 percent, 4 fatal crashes | 2.3 percent, 3 fatal crashes | 0.8 percent, 1 fatal crash |
| Wed | 0.0 percent, 0 fatal crashes | 1.5 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 3.0 percent, 4 fatal crashes | 0.8 percent, 1 fatal crash | 0.8 percent, 1 fatal crash |
| Thu | 2.3 percent, 3 fatal crashes | 0.8 percent, 1 fatal crash | 2.3 percent, 3 fatal crashes | 2.3 percent, 3 fatal crashes | 3.0 percent, 4 fatal crashes | 2.3 percent, 3 fatal crashes |
| Fri | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.5 percent, 6 fatal crashes | 1.5 percent, 2 fatal crashes | 3.0 percent, 4 fatal crashes | 6.8 percent, 9 fatal crashes |
| Sat | 6.1 percent, 8 fatal crashes | 0.0 percent, 0 fatal crashes | 2.3 percent, 3 fatal crashes | 3.0 percent, 4 fatal crashes | 4.5 percent, 6 fatal crashes | 2.3 percent, 3 fatal crashes |
By hour
By month
- Jan7.6%
- Feb7.6%
- Mar9.8%
- Apr9.1%
- May9.1%
- Jun5.3%
- Jul8.3%
- Aug11.4%
- Sep7.6%
- Oct8.3%
- Nov6.8%
- Dec9.1%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in St. Mary's County first hit
The first harmful event was a collision with another vehicle in 46%; a fixed object such as a tree, pole or barrier in 38%, a pedestrian in 9.8%, a cyclist in 0.8%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 61 | 46% |
| Fixed object (tree, pole, barrier, ditch) | 50 | 38% |
| Pedestrian | 13 | 9.8% |
| Other | 6 | 4.5% |
| Cyclist | 1 | 0.8% |
| Rollover | 1 | 0.8% |
| Parked vehicle | 0 | 0.0% |
| 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 St. Mary's County compare with Maryland
The largest difference from Maryland: from 2015 to 2024, 49% of fatal crashes in St. Mary's County were on rural roads, against 19% across Maryland. Also above the Maryland share: unlit roads at night and drinking drivers. Below it: pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of Maryland. A share is only given over 20 crashes; above or below means more than chance would give on 132 crashes.
| St. Mary's | Maryland | ||
|---|---|---|---|
| On rural roads | 49% | 19% | above the Maryland share |
| At or near an intersection | 24% | 29% | about the same as the Maryland share |
| In the dark, road unlit | 40% | 24% | above the Maryland share |
| A drinking driver | 38% | 28% | above the Maryland share |
| Speeding | 30% | 26% | about the same as the Maryland share |
| A distracted driver (as recorded) | 13% | 9.6% | about the same as the Maryland share |
| Occupants killed unbelted | 36% | 43% | about the same as the Maryland share |
| Hit-and-run | 3.8% | 7.8% | about the same as the Maryland share |
| A motorcycle involved | 15% | 16% | about the same as the Maryland share |
| Pedestrians among the dead | 9.2% | 23% | below the Maryland 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 St. Mary's County, Maryland
- How many people died in car accidents in St. Mary's County in 2024?
- 13 people died in 12 fatal crashes in St. Mary's County, Maryland, in 2024, the same as in 2023. That is 11.2 deaths per 100,000 residents, against 9.2 across Maryland. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in St. Mary's County?
- State Highway 235 had the most fatal crashes of any numbered road in St. Mary's County from 2015 to 2024: 28, with 32 deaths.
- When do fatal crashes in St. Mary's County happen most often?
- The heaviest slot from 2015 to 2024 was Sunday, midnight to 4 am (the night from Saturday), with 10 fatal crashes.
- How many fatal crashes in St. Mary's County involved a drinking driver?
- 50 of 132 fatal crashes in St. Mary's County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 38%, against 28% across Maryland.
Other counties in Maryland with a page
- Prince George's County
- Baltimore County
- Baltimore city
- Anne Arundel County
- Montgomery County
- Frederick County
- Howard County
- Charles County
- Cecil County
- Harford County
- Washington County
- Carroll County
All fatal crashes in Maryland, with every county ranked.
Where the St. Mary's County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in St. Mary's County (county code 37). 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/maryland/st-marys-county/, from NHTSA FARS (2024 Annual Report File).”