State Highway 21 in Michigan: fatal crashes
From 2015 to 2024, 41 fatal crashes on State Highway 21 in Michigan killed 42 people. In 2024 there were 3 fatal crashes and 3 deaths on the road.
An state highway running through 7 counties of Michigan. All fatal crashes in Michigan.
Deaths on State Highway 21 in Michigan by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 3 | 3 |
| 2023 | 6 | 6 |
| 2022 | 6 | 6 |
| 2021 | 3 | 3 |
| 2020 | 6 | 6 |
| 2019 | 1 | 1 |
| 2018 | 2 | 2 |
| 2017 | 5 | 5 |
| 2016 | 5 | 5 |
| 2015 | 4 | 5 |
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 Michigan: the counties with the most fatal crashes
Shiawassee County County had the most fatal crashes on State Highway 21 from 2015 to 2024: 10, with 10 deaths. Shiawassee, Ionia and Genesee counties together held 66% of fatal crashes in State Highway 21 in Michigan from 2015 to 2024; the 5 listed held 95%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Shiawassee County | 1 | 10 | 10 |
| 2 | Ionia County | 1 | 9 | 10 |
| 3 | Genesee County | 0 | 8 | 8 |
| 4 | Clinton County | 0 | 6 | 6 |
| 5 | Kent County | 1 | 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 Michigan
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 | 4.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes |
| Mon | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes |
| Tue | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 9.8 percent, 4 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 9.8 percent, 4 fatal crashes | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 4.9 percent, 2 fatal crashes |
| Thu | 2.4 percent, 1 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.9 percent, 2 fatal crashes | 7.3 percent, 3 fatal crashes |
| Fri | 2.4 percent, 1 fatal crashes | 4.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes | 2.4 percent, 1 fatal crashes |
| Sat | 7.3 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.9 percent, 2 fatal crashes | 4.9 percent, 2 fatal crashes |
By hour
By month
- Jan9.8%
- Feb4.9%
- Mar0.0%
- Apr7.3%
- May7.3%
- Jun4.9%
- Jul4.9%
- Aug4.9%
- Sep9.8%
- Oct17.1%
- Nov12.2%
- Dec17.1%
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 Michigan first hit
The first harmful event was a collision with another vehicle in 46%; a pedestrian in 24%, a fixed object such as a tree, pole or barrier in 12%, a cyclist in 7.3%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 19 | 46% |
| Pedestrian | 10 | 24% |
| Fixed object (tree, pole, barrier, ditch) | 5 | 12% |
| Cyclist | 3 | 7.3% |
| Rollover | 2 | 4.9% |
| Other | 2 | 4.9% |
| 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 Michigan compare with the state
A drinking driver was recorded in 20% of fatal crashes in State Highway 21 in Michigan from 2015 to 2024, below the Michigan share of 28%; speeding in 22%, below the Michigan share of 25%; a hit-and-run in 7.3%, about the Michigan share; 25% of passenger-vehicle occupants killed with belt use known were unbelted, below the Michigan share of 38%. Shares of fatal crashes from 2015 to 2024, against the share across all of Michigan. A share is only given over 20 crashes.
| State Highway 21 | Michigan | ||
|---|---|---|---|
| On rural stretches | 46% | 41% | above the Michigan share |
| At or near an intersection | 34% | 29% | above the Michigan share |
| In the dark, road unlit | 34% | 26% | above the Michigan share |
| A drinking driver | 20% | 28% | below the Michigan share |
| Speeding | 22% | 25% | below the Michigan share |
| Occupants killed unbelted | 25% | 38% | below the Michigan share |
| Hit-and-run | 7.3% | 6.5% | about the same as the Michigan share |
| A motorcycle involved | 15% | 16% | below the Michigan share |
| Pedestrians among the dead | 24% | 15% | above the Michigan 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 Michigan
- How many fatal crashes have there been on State Highway 21 in Michigan?
- 41 fatal crashes killed 42 people on State Highway 21 in Michigan from 2015 to 2024. In 2024 there were 3 fatal crashes and 3 deaths.
- Where on State Highway 21 in Michigan do the most fatal crashes happen?
- Shiawassee County had the most fatal crashes on State Highway 21 from 2015 to 2024: 10, with 10 deaths. Ionia County was second with 9.
Other roads in Michigan with a page
- I-69
- I-75
- I-94
- I-96
- State Highway 10
- State Highway 102
- State Highway 24
- State Highway 25
- State Highway 3
- State Highway 37
- State Highway 43
- State Highway 46
All fatal crashes in Michigan, 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 Michigan (filed under 14 spellings, such as "SR--21", "SR-21", "SR-21 BLUE WATER HWY", "SR-21 BLUEWATER HWY"). Ramps, frontage and service roads are left out. A fatal crash is one in which someone died within 30 days. The full method.