Fatal crashes in Jefferson County, Missouri
In 2024, 26 people died in 25 fatal crashes in Jefferson County, Missouri, 8.3% more than in 2023. From 2015 to 2024 the county recorded 324 fatal crashes and 345 deaths, the 5th most of 115 counties in Missouri.
11.2 deaths per 100,000 residents, against 15.3 across Missouri in 2024; 15.2 against 15.5 a year over 2015 to 2024. Population 231,888, Census Bureau estimate. All fatal crashes in Missouri.
Deaths in Jefferson County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 25 | 26 |
| 2023 | 24 | 24 |
| 2022 | 40 | 43 |
| 2021 | 40 | 45 |
| 2020 | 37 | 39 |
| 2019 | 35 | 36 |
| 2018 | 24 | 28 |
| 2017 | 35 | 35 |
| 2016 | 34 | 39 |
| 2015 | 30 | 30 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in Jefferson County
State Highway 30 had the most fatal crashes of any numbered road in Jefferson County from 2015 to 2024: 42, with 49 deaths. The 11 roads listed held 62% of all fatal crashes in Jefferson County from 2015 to 2024; 1 is an interstate, 2 US routes, 8 state highways. 72% of the county's fatal crashes were on an interstate, US or state route; the other 28% were on county roads and city streets. Routes are listed from 5 fatal crashes.
| Road | Fatal crashes | Deaths | 2022 to 2024 | ||
|---|---|---|---|---|---|
| 1 | State Highway 30 | 42 | 49 | 12 | |
| 2 | I-55 | 38 | 40 | 8 | |
| 3 | US 61 | 28 | 29 | 10 | |
| 4 | US 67 | 27 | 28 | 5 | |
| 5 | State Highway 21 | 21 | 22 | 7 | |
| 6 | State Highway B | 9 | 10 | 2 | |
| 7 | State Highway 141 | 9 | 9 | 1 | no page |
| 8 | State Highway 110 | 8 | 9 | 1 | no page |
| 9 | State Highway A | 7 | 9 | 1 | |
| 10 | State Highway H | 6 | 6 | 3 | |
| 11 | State Highway V | 5 | 5 | 2 | no page |
Arnold had 4.6% of the county's fatal crashes from 2015 to 2024, 15 of 324.
Cities NHTSA filed, with their fatal crashes from 2015 to 2024: Arnold 15, Kimmswick 9, Festus 8, Pevely 6, Herculaneum 5. 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 Jefferson County
The heaviest slot is Saturday, 8 pm to midnight, with 17 fatal crashes from 2015 to 2024. The worst hour is 7 pm to 8 pm; the worst month is June.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 3.7 percent, 12 fatal crashes | 0.6 percent, 2 fatal crashes | 1.6 percent, 5 fatal crashes | 2.8 percent, 9 fatal crashes | 3.7 percent, 12 fatal crashes | 2.2 percent, 7 fatal crashes |
| Mon | 1.2 percent, 4 fatal crashes | 0.9 percent, 3 fatal crashes | 2.8 percent, 9 fatal crashes | 2.2 percent, 7 fatal crashes | 1.9 percent, 6 fatal crashes | 1.6 percent, 5 fatal crashes |
| Tue | 0.3 percent, 1 fatal crash | 0.9 percent, 3 fatal crashes | 4.0 percent, 13 fatal crashes | 2.8 percent, 9 fatal crashes | 2.5 percent, 8 fatal crashes | 2.5 percent, 8 fatal crashes |
| Wed | 1.6 percent, 5 fatal crashes | 1.2 percent, 4 fatal crashes | 2.5 percent, 8 fatal crashes | 3.7 percent, 12 fatal crashes | 4.3 percent, 14 fatal crashes | 1.9 percent, 6 fatal crashes |
| Thu | 1.6 percent, 5 fatal crashes | 1.6 percent, 5 fatal crashes | 1.9 percent, 6 fatal crashes | 3.4 percent, 11 fatal crashes | 3.7 percent, 12 fatal crashes | 0.9 percent, 3 fatal crashes |
| Fri | 1.9 percent, 6 fatal crashes | 1.2 percent, 4 fatal crashes | 2.2 percent, 7 fatal crashes | 3.1 percent, 10 fatal crashes | 4.7 percent, 15 fatal crashes | 2.8 percent, 9 fatal crashes |
| Sat | 2.5 percent, 8 fatal crashes | 1.2 percent, 4 fatal crashes | 1.9 percent, 6 fatal crashes | 2.5 percent, 8 fatal crashes | 4.3 percent, 14 fatal crashes | 5.3 percent, 17 fatal crashes |
By hour
By month
- Jan8.0%
- Feb2.8%
- Mar6.8%
- Apr8.6%
- May10.8%
- Jun11.4%
- Jul8.6%
- Aug10.2%
- Sep10.5%
- Oct9.0%
- Nov7.4%
- Dec5.9%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in Jefferson County first hit
The first harmful event was a collision with another vehicle in 39%; a fixed object such as a tree, pole or barrier in 36%, a rollover in 11%, a pedestrian in 6.5%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 126 | 39% |
| Fixed object (tree, pole, barrier, ditch) | 118 | 36% |
| Rollover | 36 | 11% |
| Other | 23 | 7.1% |
| Pedestrian | 21 | 6.5% |
| Cyclist | 0 | 0.0% |
| 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 Jefferson County compare with Missouri
The largest difference from Missouri: from 2015 to 2024, 38% of fatal crashes in Jefferson County were on rural roads, against 52% across Missouri. Also above the Missouri share: unlit roads at night. Below it: hit-and-runs and pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of Missouri. A share is only given over 20 crashes; above or below means more than chance would give on 324 crashes.
| Jefferson | Missouri | ||
|---|---|---|---|
| On rural roads | 38% | 52% | below the Missouri share |
| At or near an intersection | 21% | 21% | about the same as the Missouri share |
| In the dark, road unlit | 36% | 28% | above the Missouri share |
| A drinking driver | 32% | 28% | about the same as the Missouri share |
| Speeding | 37% | 37% | about the same as the Missouri share |
| A distracted driver (as recorded) | 9.0% | 8.9% | about the same as the Missouri share |
| Occupants killed unbelted | 68% | 63% | about the same as the Missouri share |
| Hit-and-run | 2.5% | 5.2% | below the Missouri share |
| A motorcycle involved | 18% | 15% | about the same as the Missouri share |
| Pedestrians among the dead | 7.5% | 12% | below the Missouri 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 Jefferson County, Missouri
- How many people died in car accidents in Jefferson County in 2024?
- 26 people died in 25 fatal crashes in Jefferson County, Missouri, in 2024, 8.3% more than in 2023. That is 11.2 deaths per 100,000 residents, against 15.3 across Missouri. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in Jefferson County?
- State Highway 30 had the most fatal crashes of any numbered road in Jefferson County from 2015 to 2024: 42, with 49 deaths.
- When do fatal crashes in Jefferson County happen most often?
- The heaviest slot from 2015 to 2024 was Saturday, 8 pm to midnight, with 17 fatal crashes.
- How many fatal crashes in Jefferson County involved a drinking driver?
- 102 of 324 fatal crashes in Jefferson County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 32%, against 28% across Missouri.
Other counties in Missouri with a page
- Jackson County
- St. Louis County
- St. Louis city
- Greene County
- St. Charles County
- Clay County
- Franklin County
- Boone County
- Jasper County
- Newton County
- Cass County
- St. Francois County
All fatal crashes in Missouri, with every county ranked.
Where the Jefferson County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in Jefferson County (county code 99). 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/missouri/jefferson-county/, from NHTSA FARS (2024 Annual Report File).”