State Highway 21 in Missouri: fatal crashes
From 2015 to 2024, 70 fatal crashes on State Highway 21 in Missouri killed 74 people. In 2024 there were 7 fatal crashes and 8 deaths on the road.
An state highway running through 7 counties of Missouri. All fatal crashes in Missouri.
Deaths on State Highway 21 in Missouri by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 7 | 8 |
| 2023 | 7 | 8 |
| 2022 | 9 | 9 |
| 2021 | 7 | 7 |
| 2020 | 7 | 7 |
| 2019 | 9 | 10 |
| 2018 | 4 | 4 |
| 2017 | 6 | 6 |
| 2016 | 7 | 7 |
| 2015 | 7 | 8 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on State Highway 21 in Missouri: the counties with the most fatal crashes
Jefferson County County had the most fatal crashes on State Highway 21 from 2015 to 2024: 21, with 22 deaths. Jefferson, Washington and Reynolds counties together held 79% of fatal crashes in State Highway 21 in Missouri from 2015 to 2024; the 4 listed held 87%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Jefferson County | 1 | 21 | 22 |
| 2 | Washington County | 4 | 20 | 22 |
| 3 | Reynolds County | 2 | 14 | 15 |
| 4 | St. Louis County | 0 | 6 | 6 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen on State Highway 21 in Missouri
Too few crashes to name a heaviest slot. The grid shows the shares; a share is only given over 20 crashes.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.3 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes |
| Mon | 2.9 percent, 2 fatal crashes | 1.4 percent, 1 fatal crashes | 4.3 percent, 3 fatal crashes | 7.1 percent, 5 fatal crashes | 2.9 percent, 2 fatal crashes | 1.4 percent, 1 fatal crashes |
| Tue | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes | 4.3 percent, 3 fatal crashes | 1.4 percent, 1 fatal crashes | 5.7 percent, 4 fatal crashes | 4.3 percent, 3 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 4.3 percent, 3 fatal crashes | 5.7 percent, 4 fatal crashes | 2.9 percent, 2 fatal crashes | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 0.0 percent, 0 fatal crashes | 7.1 percent, 5 fatal crashes | 2.9 percent, 2 fatal crashes | 4.3 percent, 3 fatal crashes | 8.6 percent, 6 fatal crashes | 1.4 percent, 1 fatal crashes |
| Fri | 1.4 percent, 1 fatal crashes | 1.4 percent, 1 fatal crashes | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Sat | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.4 percent, 1 fatal crashes | 1.4 percent, 1 fatal crashes | 1.4 percent, 1 fatal crashes | 1.4 percent, 1 fatal crashes |
By hour
By month
- Jan4.3%
- Feb4.3%
- Mar8.6%
- Apr7.1%
- May14.3%
- Jun11.4%
- Jul5.7%
- Aug8.6%
- Sep8.6%
- Oct8.6%
- Nov10.0%
- 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 on State Highway 21 in Missouri first hit
The first harmful event was a fixed object such as a tree, pole or barrier in 43%; a collision with another vehicle in 34%, a rollover in 5.7%, a pedestrian in 4.3%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Fixed object (tree, pole, barrier, ditch) | 30 | 43% |
| Collision with another vehicle | 24 | 34% |
| Other | 9 | 13% |
| Rollover | 4 | 5.7% |
| Pedestrian | 3 | 4.3% |
| 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 on State Highway 21 in Missouri compare with the state
A drinking driver was recorded in 16% of fatal crashes in State Highway 21 in Missouri from 2015 to 2024, below the Missouri share of 28%; speeding in 27%, below the Missouri share of 37%; a hit-and-run in 1.4%, below the Missouri share of 5.2%; a driver recorded as distracted in 7.1%, below the Missouri share of 8.9%; 68% of passenger-vehicle occupants killed with belt use known were unbelted, above the Missouri share of 63%. Shares of fatal crashes from 2015 to 2024, against the share across all of Missouri. A share is only given over 20 crashes.
| State Highway 21 | Missouri | ||
|---|---|---|---|
| On rural stretches | 78% | 52% | above the Missouri share |
| At or near an intersection | 16% | 21% | below the Missouri share |
| In the dark, road unlit | 31% | 28% | above the Missouri share |
| A drinking driver | 16% | 28% | below the Missouri share |
| Speeding | 27% | 37% | below the Missouri share |
| A distracted driver (as recorded) | 7.1% | 8.9% | below the Missouri share |
| Occupants killed unbelted | 68% | 63% | above the Missouri share |
| Hit-and-run | 1.4% | 5.2% | below the Missouri share |
| A motorcycle involved | 13% | 15% | below the Missouri share |
| Pedestrians among the dead | 4.1% | 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 State Highway 21 in Missouri
- How many fatal crashes have there been on State Highway 21 in Missouri?
- 70 fatal crashes killed 74 people on State Highway 21 in Missouri from 2015 to 2024. In 2024 there were 7 fatal crashes and 8 deaths.
- Where on State Highway 21 in Missouri do the most fatal crashes happen?
- Jefferson County had the most fatal crashes on State Highway 21 from 2015 to 2024: 21, with 22 deaths. Washington County was second with 20.
Other roads in Missouri with a page
- I-270
- I-435
- I-44
- I-49
- I-55
- I-70
- State Highway 100
- State Highway 13
- State Highway 30
- State Highway 32
- State Highway 43
- State Highway 5
All fatal crashes in Missouri, with every road ranked.
Where the State Highway 21 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as State Highway 21 in Missouri (filed under 3 spellings, such as "SR-21", "SR-21 N STATE HWY 21", "SR-21 TESSON FERRY RD"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.