Rock County, Wisconsin: fatal crash statistics

Counties of Wisconsin by year (CSV)Cite this page

FARS records 16 deaths in 12 fatal crashes in Rock County in 2024.

FARS records 210 deaths in 191 fatal crashes in the county from 2015 to 2024.

From 2015 to 2024 the rate is 12.9 deaths for each 100,000 residents in a year.

The rate of Wisconsin in the same years is 10.2.

By deaths from 2015 to 2024, Rock County was number 3 of 72 counties of Wisconsin.

Deaths in Rock County fell by 4.5% between the ten years 2005 to 2014 (220) and the ten years 2015 to 2024 (210).

In the counties of Wisconsin the deaths fell by 5.1% between the same years.

From 2015 to 2024, a driver was recorded as drinking in 41.4% of fatal crashes in Rock County and 33.4% in Wisconsin.

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 Rock 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.Rock County: deaths and fatal crashes by year, 2015 to 2024
Year	Deaths	Fatal crashes	Crashes with a driver recorded as drinking
2024	16	12	4
2023	13	13	7
2022	17	15	7
2021	31	29	11
2020	25	22	9
2019	23	22	9
2018	31	28	11
2017	13	13	5
2016	23	20	10
2015	18	17	6
2015 to 2024	210	191	79

Each year from 1975

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

Tallest column: 37 (2003)2024: 16

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

Table 2.Rock County: deaths and fatal crashes by year, 1975 to 2024
Year	Deaths	Fatal crashes
2024	16	12
2023	13	13
2022	17	15
2021	31	29
2020	25	22
2019	23	22
2018	31	28
2017	13	13
2016	23	20
2015	18	17
2014	13	11
2013	11	9
2012	18	16
2011	24	18
2010	24	23
2009	19	17
2008	17	16
2007	32	25
2006	27	26
2005	35	26
2004	21	20
2003	37	30
2002	31	27
2001	23	22
2000	25	23
1999	26	20
1998	20	16
1997	11	10
1996	33	28
1995	20	17
1994	33	29
1993	22	19
1992	17	14
1991	20	16
1990	19	18
1989	33	28
1988	19	17
1987	17	14
1986	23	18
1985	32	30
1984	21	19
1983	26	25
1982	23	22
1981	27	22
1980	20	20
1979	22	21
1978	28	25
1977	16	14
1976	19	16
1975	18	17

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.Rock County beside Wisconsin and the United States: deaths for each 100,000 residents
Period	Rock County	Wisconsin	United States
2024	9.7	10.0	11.5
2015 to 2024, in a year	12.9	10.2	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. Rock County had 165,665 residents in 2024.

Factors that NHTSA records

Table 4.Rock County: counts by recorded factor, 2015 to 2024
Factor	Count	Counted among	Share	Share in Wisconsin
A driver recorded as drinkingof 191 fatal crashes	79	191 fatal crashes	41.4%	33.4%
A speeding-related driverof 191 fatal crashes	55	191 fatal crashes	28.8%	31.0%
No restraint usedof 141 occupant deaths with restraint use known	71	141 occupant deathswith restraint use known	50.4%	49.1%
Pedestriansof 210 deaths	15	210 deaths	7.1%	9.5%
Bicyclistsof 210 deaths	1 or 2	210 deaths	1.0%	1.7%
Motorcyclistsof 210 deaths	32	210 deaths	15.2%	15.8%
On a rural roadof 191 fatal crashes with the condition reported	113	191 fatal crasheswith the condition reported	59.2%	62.5%
In the darkof 190 fatal crashes with the condition reported	72	190 fatal crasheswith the condition reported	37.9%	41.7%

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.Rock 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	7	5	11	11	34
Monday	4	1 or 2	9	6	21
Tuesday	1 or 2	6	5	5	17
Wednesday	1 or 2	5	10	6	23
Thursday	1 or 2	7	14	3	26
Friday	3	5	7	11	26
Saturday	11	8	9	13	41
All days	30	38	65	55	188

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.Rock County: fatal crashes by road function class, 2015 to 2024
Road function class	Fatal crashes	Share	Share in Wisconsin
Interstate	23	12.0%	7.6%
Other freeways and expressways	1 or 2	0.5%	2.3%
Other principal arterial	65	34.0%	29.4%
Minor arterial	49	25.7%	22.7%
Major collector	19	9.9%	17.2%
Minor collector	8	4.2%	6.2%
Local	26	13.6%	14.6%
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.Rock County: fatal crashes by light condition, 2015 to 2024
Light condition	Fatal crashes
Daylight	106
Dark, not lighted	49
Dark, lighted	21
Dawn	5
Dusk	7
Dark, lighting unknown	1 or 2
Other or unknown	1 or 2

Table 8.Rock County: fatal crashes by weather, 2015 to 2024
Weather	Fatal crashes
Clear	100
Cloudy	68
Rain	10
Snow, sleet or freezing rain	6
Fog, smog or smoke	3
Crosswinds or blowing sand/snow	1 or 2
Other or not reported	3

Routes in the county

Table 9.Signed routes in Rock County that have a page: fatal crashes, 2015 to 2024
Route	Type	In Rock	In all of Wisconsin
Interstate 39	Interstate	15	68
Interstate 43	Interstate	7	83
State Route 11	State highway	7	49
State Route 26	State highway	6	23
State Route 59	State highway	9	30
State Route 67	State highway	1 or 2	21
State Route 81	State highway	12	26
US Route 12	US highway	1 or 2	108
US Route 14	US highway	21	59
US Route 51	US highway	12	73

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 Wisconsin

Adjacent counties

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

Figure 3.Rock County on the county map of Wisconsin

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

Fewer than 1018 counties
10 to 14.922 counties
15 to 19.916 counties
20 to 29.914 counties
30 or more2 counties
Rock County: 12.9

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 Wisconsin

Table 10.Counties that share a boundary line with Rock County
County	State	Deaths, 2024	Deaths, 2015 to 2024	For each 100,000 residents in a year
Boone County	Illinois	6	65	12.2
Winnebago County	Illinois	27	308	10.8
Dane County	Wisconsin	38	352	6.3
Green County	Wisconsin	3	49	13.3
Jefferson County	Wisconsin	12	96	11.2
Walworth County	Wisconsin	12	140	13.4

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

Counties of similar population

These counties of Wisconsin have a population nearest to that of Rock 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.
Governors Highway Safety Association: State Highway Safety OfficesThe list of the highway safety offices of the states.

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

Cite this page

Fatal Roads. Rock County, Wisconsin: fatal crash statistics. https://fatalroads.com/county/wi/rock/. 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.

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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 Rock in the ten years before 2015?

FARS records 220 deaths in Rock County from 2005 to 2014. It records 210 deaths from 2015 to 2024.

What was the rate of Rock in 2024?

The rate of Rock County in 2024 was 9.7 deaths for each 100,000 residents. The rate of Wisconsin was 10.0. The rate of the United States was 11.5.

How many fatal crashes in Rock had a driver recorded as drinking?

FARS records a driver as drinking in 79 of 191 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 Rock?

10 signed routes in the county have a page. FARS records 92 fatal crashes on them in the county from 2015 to 2024. The table of routes on this page gives the count for each route.