St. Clair County, Illinois: fatal crash statistics

Counties of Illinois by year (CSV)Cite this page

FARS records 45 deaths in 40 fatal crashes in St. Clair County in 2024.

FARS records 371 deaths in 346 fatal crashes in the county from 2015 to 2024.

From 2015 to 2024 the rate is 14.4 deaths for each 100,000 residents in a year.

The rate of Illinois in the same years is 9.0.

By deaths from 2015 to 2024, St. Clair County was number 5 of 102 counties of Illinois.

Deaths in St. Clair County rose by 5.4% between the ten years 2005 to 2014 (352) and the ten years 2015 to 2024 (371).

In the counties of Illinois the deaths rose by 8.4% between the same years.

From 2015 to 2024, 16.2% of the fatal crashes in St. Clair County with a known setting were rural, against 33.6% in Illinois.

To qualify as a FARS case, the crash had to involve a motor vehicle traveling on a trafficway customarily open to the public and must have resulted in the death of a motorist or a non-motorist within 30 days of the crash.
The set of first files, known as the Annual Report File (ARF), is released following the crash year. The ARF is replaced about a year later with a final file, which contains additional cases or updates to cases that had become available after the ARF was released.
NHTSA's words. Source: NHTSA, Fatality Analysis Reporting System Analytical User's Manual, 1975-2024 (DOT HS 813 794, April 2026), copied on 2 Oct 2026.

This page rests on the FARS 2024 annual file. NHTSA released it on 1 Apr 2026. NHTSA can revise the counts in the final file. Release dates

Figure 1.Deaths in St. Clair County by year, 2015 to 2024

Table 1 has the numbers. Go to the table

Since the last update: no figure of this county has a change on record.

Deaths and fatal crashes by year

Table 1.St. Clair County: deaths and fatal crashes by year, 2015 to 2024
Year	Deaths	Fatal crashes	Crashes with a driver recorded as drinking
2024	45	40	14
2023	36	36	9
2022	47	46	10
2021	40	34	20
2020	32	32	6
2019	26	25	10
2018	30	30	9
2017	36	32	15
2016	40	37	13
2015	39	34	8
2015 to 2024	371	346	114

Each year from 1975

Figure 2.Deaths in St. Clair County by year, 1975 to 2024

Tallest column: 79 (1977)2024: 45

The columns with a stronger shade are the years 2015 to 2024.

Table 2.St. Clair County: deaths and fatal crashes by year, 1975 to 2024
Year	Deaths	Fatal crashes
2024	45	40
2023	36	36
2022	47	46
2021	40	34
2020	32	32
2019	26	25
2018	30	30
2017	36	32
2016	40	37
2015	39	34
2014	31	29
2013	45	38
2012	28	27
2011	31	30
2010	26	26
2009	31	30
2008	31	26
2007	45	40
2006	51	39
2005	33	28
2004	48	38
2003	47	44
2002	34	33
2001	54	49
2000	47	40
1999	53	47
1998	44	39
1997	39	34
1996	51	36
1995	45	41
1994	45	42
1993	35	31
1992	39	35
1991	46	41
1990	53	47
1989	36	30
1988	54	52
1987	52	48
1986	45	41
1985	47	44
1984	42	36
1983	36	35
1982	51	43
1981	67	55
1980	61	55
1979	68	56
1978	61	52
1977	79	66
1976	70	62
1975	74	65

Note: a count of 1 or 2 is written "1 or 2". A death is in FARS when it occurs in 30 days or less after the crash.

Rate for each 100,000 residents

Table 3.St. Clair County beside Illinois and the United States: deaths for each 100,000 residents
Period	St. Clair County	Illinois	United States
2024	17.9	9.3	11.5
2015 to 2024, in a year	14.4	9.0	11.8

Note: the rate divides the deaths in the county by its residents. Persons who do not live in the county are in the deaths, not in the residents.

Population: Census Bureau estimates, vintage 2025. St. Clair County had 251,375 residents in 2024.

Factors that NHTSA records

Table 4.St. Clair County: counts by recorded factor, 2015 to 2024
Factor	Count	Counted among	Share	Share in Illinois
A driver recorded as drinkingof 346 fatal crashes	114	346 fatal crashes	32.9%	27.2%
A speeding-related driverof 346 fatal crashes	130	346 fatal crashes	37.6%	36.5%
No restraint usedof 225 occupant deaths with restraint use known	120	225 occupant deathswith restraint use known	53.3%	46.8%
Pedestriansof 371 deaths	69	371 deaths	18.6%	15.5%
Bicyclistsof 371 deaths	6	371 deaths	1.6%	2.5%
Motorcyclistsof 371 deaths	40	371 deaths	10.8%	13.3%
On a rural roadof 346 fatal crashes with the condition reported	56	346 fatal crasheswith the condition reported	16.2%	33.6%
In the darkof 341 fatal crashes with the condition reported	197	341 fatal crasheswith the condition reported	57.8%	48.7%

Note: FARS records a driver as drinking when police reported alcohol involvement or a test of the driver was positive for alcohol. It is not NHTSA's alcohol-impaired measure, which uses a blood alcohol concentration of .08 g/dL or higher. One crash can be in two or more rows. NHTSA's definitions

Note that alcohol data is often missing. For that reason, this data element may under-count the actual number of drinking drivers.

NHTSA's words. Source: NHTSA, Fatality Analysis Reporting System Analytical User's Manual, 1975-2024 (DOT HS 813 794, April 2026), copied on 2 Oct 2026.

Weekday, time and road class

Table 5.St. Clair County: fatal crashes by weekday and time of day, 2015 to 2024
Weekday	Midnight to 6 a.m.	6 a.m. to noon	Noon to 6 p.m.	6 p.m. to midnight	All
Sunday	24	10	11	19	64
Monday	8	5	10	16	39
Tuesday	8	3	11	16	38
Wednesday	6	9	8	19	42
Thursday	7	10	10	17	44
Friday	21	8	15	10	54
Saturday	22	10	12	21	65
All days	96	55	77	118	346

Note: a cell with a stronger shade has a larger count. The table has the fatal crashes with a known hour and weekday.

Table 6.St. Clair County: fatal crashes by road function class, 2015 to 2024
Road function class	Fatal crashes	Share	Share in Illinois
Interstate	64	18.5%	14.2%
Other freeways and expressways	1 or 2	0.3%	0.7%
Other principal arterial	109	31.5%	29.1%
Minor arterial	97	28.0%	24.5%
Major collector	44	12.7%	17.0%
Minor collector	5	1.4%	2.0%
Local	26	7.5%	12.5%
Not reported	0	n/a	n/a

Note: the classes are those of the Federal Highway Administration. The shares are of the crashes with a reported class. Road function classes

Light condition and weather

Table 7.St. Clair County: fatal crashes by light condition, 2015 to 2024
Light condition	Fatal crashes
Daylight	131
Dark, not lighted	106
Dark, lighted	82
Dawn	8
Dusk	5
Dark, lighting unknown	9
Other or unknown	5

Table 8.St. Clair County: fatal crashes by weather, 2015 to 2024
Weather	Fatal crashes
Clear	298
Cloudy	5
Rain	28
Snow, sleet or freezing rain	3
Fog, smog or smoke	4
Crosswinds or blowing sand/snow	1 or 2
Other or not reported	7

Routes in the county

Table 9.Signed routes in St. Clair County that have a page: fatal crashes, 2015 to 2024
Route	Type	In St. Clair	In all of Illinois
Interstate 55	Interstate	11	263
Interstate 64	Interstate	32	62
Interstate 70	Interstate	3	74
Interstate 255	Interstate	16	32
State Route 3	State highway	27	91
State Route 4	State highway	7	44
State Route 13	State highway	14	57
State Route 15	State highway	17	46
State Route 50	State highway	1 or 2	106
State Route 111	State highway	3	38
State Route 157	State highway	13	26
State Route 159	State highway	11	25
State Route 161	State highway	20	28
US Route 30	US highway	1 or 2	101
US Route 50	US highway	10	55

Note: the table has each route with a page that has a fatal crash in the county, in name order. Local streets and county roads have no page. Their crashes are in the county totals. All routes in Illinois

Adjacent counties

These lists are for navigation. They are in name order.

Figure 3.St. Clair County on the county map of Illinois

Deaths for each 100,000 residents in a year, 2015 to 2024

Fewer than 1016 counties
10 to 14.926 counties
15 to 19.927 counties
20 to 29.928 counties
30 or more5 counties
St. Clair County: 14.4

The limits of the classes are the same for every state. A county with few residents can show a high rate from few deaths. A class is not a judgement of a county. The full map and the table of counties of Illinois

Table 10.Counties that share a boundary line with St. Clair County
County	State	Deaths, 2024	Deaths, 2015 to 2024	For each 100,000 residents in a year
Clinton County	Illinois	3	60	16.1
Madison County	Illinois	39	344	13.0
Monroe County	Illinois	3	37	10.7
Randolph County	Illinois	11	64	20.6
Washington County	Illinois	6	58	41.9
St. Louis city	Missouri	48	613	20.5
St. Louis County	Missouri	112	899	9.0

Source of the list: Census Bureau county adjacency file, 2026 edition.

Counties of similar population

These counties of Illinois have a population nearest to that of St. Clair County. The list is for navigation and is in name order. The number is the deaths from 2015 to 2024.

Official channels

NHTSA Fatality and Injury Reporting System Tool (FIRST)NHTSA's query tool for FARS counts.
NHTSA FARS EncyclopediaNHTSA's tables of FARS data.
Illinois Department of TransportationThe highway safety office of Illinois.

These links go to the sites of the agencies. They were checked on 2 Oct 2026.

Cite this page

Fatal Roads. St. Clair County, Illinois: fatal crash statistics. https://fatalroads.com/county/il/st-clair/. Source: National Highway Traffic Safety Administration, Fatality Analysis Reporting System, FARS 2024 annual file. Data to 31 Dec 2024.

The address of this page does not change.

Embed this card on your site

Copy this code into your page. The card shows the figures above with their source. A line under the card links to this page.

<iframe src="https://fatalroads.com/embed/county/il/st-clair/" title="Fatal crashes in St. Clair County, Illinois" width="100%" height="300" style="border:0;max-width:640px" loading="lazy"></iframe>
<p style="margin:4px 0 0;font-size:13px"><a href="https://fatalroads.com/county/il/st-clair/">Fatal crashes in St. Clair County, Illinois</a>, from fatalroads.com</p>

How embedding works. It is free. Keep the link in the card and the link line under it.

Source of the figures

Counts: National Highway Traffic Safety Administration, Fatality Analysis Reporting System, national files of 1975 to 2024. The factors use the vehicle and person files from 2015. Residents: Census Bureau, Population Estimates Program, vintage 2025. Map: Census Bureau cartographic boundary file, 2021 edition. Data to 31 Dec 2024. The figures are totals. No page of this site is about one crash or one person.

How the figures are made. Data sources and licences. Corrections.

Questions

How many deaths did FARS record in St. Clair in the ten years before 2015?

FARS records 352 deaths in St. Clair County from 2005 to 2014. It records 371 deaths from 2015 to 2024.

What was the rate of St. Clair in 2024?

The rate of St. Clair County in 2024 was 17.9 deaths for each 100,000 residents. The rate of Illinois was 9.3. The rate of the United States was 11.5.

How many fatal crashes in St. Clair had a driver recorded as drinking?

FARS records a driver as drinking in 114 of 346 fatal crashes from 2015 to 2024. This count is not NHTSA's alcohol-impaired measure. NHTSA says that alcohol data is often missing, so the count may be too low.

How many fatal crashes did FARS record on signed routes in St. Clair?

15 signed routes in the county have a page. FARS records 186 fatal crashes on them in the county from 2015 to 2024. The table of routes on this page gives the count for each route.