State Highway 23 in Illinois: fatal crashes
From 2015 to 2024, 43 fatal crashes on State Highway 23 in Illinois killed 48 people, the 40th most of 212 numbered roads in Illinois. In 2024 there were 6 fatal crashes and 6 deaths on the road.
A state highway running through 4 counties of Illinois. All fatal crashes in Illinois.
Deaths on State Highway 23 in Illinois by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 6 | 6 |
| 2023 | 4 | 5 |
| 2022 | 5 | 6 |
| 2021 | 5 | 6 |
| 2020 | 6 | 6 |
| 2019 | 1 | 2 |
| 2018 | 5 | 6 |
| 2017 | 3 | 3 |
| 2016 | 3 | 3 |
| 2015 | 5 | 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 23 in Illinois: the counties with the most fatal crashes
DeKalb County had the most fatal crashes on State Highway 23 from 2015 to 2024: 18, with 20 deaths. DeKalb, LaSalle and McHenry counties together held 88% of fatal crashes on State Highway 23 in Illinois from 2015 to 2024. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | DeKalb County | 4 | 18 | 20 |
| 2 | LaSalle County | 2 | 15 | 16 |
| 3 | McHenry County | 0 | 5 | 7 |
| 4 | Livingston County | 0 | 5 | 5 |
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 23 in Illinois
43 fatal crashes on State Highway 23 in Illinois from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. The worst hour is 6 am to 7 am; the worst month is November.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes |
| Mon | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 2.3 percent, 1 fatal crash | 4.7 percent, 2 fatal crashes |
| Tue | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash | 4.7 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 4.7 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 2.3 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 2.3 percent, 1 fatal crash | 4.7 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 0.0 percent, 0 fatal crashes | 2.3 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 7.0 percent, 3 fatal crashes | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash |
| Fri | 4.7 percent, 2 fatal crashes | 4.7 percent, 2 fatal crashes | 7.0 percent, 3 fatal crashes | 4.7 percent, 2 fatal crashes | 4.7 percent, 2 fatal crashes | 2.3 percent, 1 fatal crash |
| Sat | 2.3 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes | 2.3 percent, 1 fatal crash | 2.3 percent, 1 fatal crash | 4.7 percent, 2 fatal crashes | 4.7 percent, 2 fatal crashes |
By hour
By month
- Jan2.3%
- Feb7.0%
- Mar14.0%
- Apr0.0%
- May16.3%
- Jun2.3%
- Jul11.6%
- Aug11.6%
- Sep9.3%
- Oct7.0%
- Nov18.6%
- Dec0.0%
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 23 in Illinois first hit
The first harmful event was a collision with another vehicle in most fatal crashes, 65%; a fixed object such as a tree, pole or barrier in 16%, a pedestrian in 14%, a parked vehicle in 2.3%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 28 | 65% |
| Fixed object (tree, pole, barrier, ditch) | 7 | 16% |
| Pedestrian | 6 | 14% |
| Parked vehicle | 1 | 2.3% |
| Other | 1 | 2.3% |
| Cyclist | 0 | 0.0% |
| Rollover | 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 23 in Illinois compare with the state
The largest difference from Illinois: from 2015 to 2024, 49% of fatal crashes on State Highway 23 in Illinois were at or near an intersection, against 30% across Illinois. Also above the Illinois share: rural roads. Below it: speeding, unbelted occupants and hit-and-runs. Shares of fatal crashes from 2015 to 2024, against the share across all of Illinois. A share is only given over 20 crashes; above or below means more than chance would give on 43 crashes.
| State Highway 23 | Illinois | ||
|---|---|---|---|
| On rural stretches | 51% | 34% | above the Illinois share |
| At or near an intersection | 49% | 30% | above the Illinois share |
| In the dark, road unlit | 30% | 25% | about the same as the Illinois share |
| A drinking driver | 16% | 27% | about the same as the Illinois share |
| Speeding | 19% | 37% | below the Illinois share |
| A distracted driver (as recorded) | 4.7% | 9.8% | about the same as the Illinois share |
| Occupants killed unbelted | 31% | 46% | below the Illinois share |
| Hit-and-run | 0.0% | 8.4% | below the Illinois share |
| A motorcycle involved | 12% | 14% | about the same as the Illinois share |
| Pedestrians among the dead | 13% | 16% | about the same as the Illinois 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 on State Highway 23 in Illinois
- How many fatal crashes have there been on State Highway 23 in Illinois?
- 43 fatal crashes killed 48 people on State Highway 23 in Illinois from 2015 to 2024. In 2024 there were 6 fatal crashes and 6 deaths. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Where on State Highway 23 in Illinois do the most fatal crashes happen?
- DeKalb County had the most fatal crashes on State Highway 23 from 2015 to 2024: 18, with 20 deaths. LaSalle County was second with 15.
Other roads in Illinois with a page
All fatal crashes in Illinois, with every road ranked.
Where the State Highway 23 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 23 in Illinois (filed under 18 spellings, such as "SR- 23", "SR-23", "SR-23 (17TH RD)", "SR-23 (SYCAMORE RD)"). Ramps, frontage and service roads are left out. Where two routes share a road, NHTSA files each crash under one of them, so a shared stretch counts on one route only. A fatal crash is one in which someone died within 30 days. Totals in state and news reports for a road usually differ: they include ramps and frontage roads, or count from preliminary reports. The full method.