Police Reports in Wisconsin
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About Wisconsin Police Reports
Important Information
MV4000 forms with overlay sheets provide comprehensive data
Processing Details
Milwaukee and Madison have local units
Additional Notes
MV4000 overlay sheet available
Available Report Types
- Form MV4000
- State Patrol Reports
- Local Reports
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Wisconsin Motor Vehicle Accident Report (MV 4000)
Form overview
The Wisconsin Department of Transportation (WisDOT) and Wisconsin State Patrol issue the MV 4000 report and require law enforcement agencies to complete it when a crash involves injury, death or property damage that meets statutory reporting thresholds. The form is four pages long, with each page dedicated to different aspects of the crash. It incorporates numbered codes to represent crash characteristics, vehicle and driver information, environmental conditions and contributing factors. An accompanying code sheet explains each numeric code, and officers receive training to ensure accurate completion. The structured design makes it possible to load thousands of reports into the state's crash database and analyze them for safety trends.
Section breakdown
Page 1 – Crash overview, drivers and passengers
The top of the first page contains information about the exact location, date and time of the crash. Officers note the street or highway name, the nearest intersection or mile marker and whether the crash occurred at an intersection. Boxes indicate if the crash was a hit and run, involved a highway or occurred at a specific location like a ramp. The investigating officer records the number of vehicles, the number of injuries and fatalities and whether an ambulance responded. If damage estimates are provided, drivers should verify them because insurers may rely on these numbers. The middle of page 1 contains detailed driver information. For each of the first two drivers, the report lists their name, address, driver's license number, date of birth and contact information. Officers note whether the driver was wearing a seat belt or helmet, the severity of any injuries and whether extrication was needed. They also record the driver's insurance company and policy number. In the vehicle section, the report captures the vehicle's year, make, model, color, license plate number, Vehicle Identification Number (VIN) and state of registration. There are boxes to indicate whether the vehicle was towed from the scene and whether the driver was cited for any offenses. The bottom of page 1 lists passengers and their seating positions. For each passenger, the officer notes whether they were injured or killed, whether they were wearing a seat belt, and whether an airbag deployed. If a passenger was ejected or required extrication, that is recorded. If more than two vehicles or numerous passengers are involved, officers attach additional sheets. At the very bottom of the page, the report provides the investigating officer's name and contact information, ensuring transparency and allowing anyone with questions to follow up.
Page 2 – Additional people and crash type
The second page continues documenting the people involved in the crash. The top section lists any additional passengers, pedestrians or cyclists, including their contact information, seating position or location and injury severity. Officers note whether each person was transported to a hospital. This ensures that all individuals involved are accounted for. The middle and bottom sections describe the type of accident and the condition of the drivers. The report identifies the first harmful event, which could be a collision with another vehicle, a collision with a fixed object or a non‑collision event such as a vehicle overturn. A box labeled "manner of collision" distinguishes between rear‑end, head‑on, sideswipe, angle and other collision types. The report also indicates whether either driver was under the influence of alcohol or drugs and records blood‑alcohol test results if available. Officers use codes to describe the drivers' actions and conditions, such as speeding, following too closely, improper passing, distracted driving or fatigue. These factors are crucial for assigning fault and for researchers studying driver behavior.
Page 3 – Diagram, narrative and environmental codes
The third page features the investigating officer's diagram of the crash. Officially called the pictorial representation of narrative, the drawing shows the roadway layout, lanes, direction of travel and the position of each vehicle at the moment of impact. By examining this diagram, drivers and insurers can verify whether the official description matches their memory of the crash. The middle of page 3 contains the officer's written narrative, which explains what happened in plain language. The narrative is based on statements from drivers, passengers and witnesses, as well as physical evidence at the scene. Because free‑form narratives can capture nuances that codes cannot, they play a critical role in understanding the crash. The bottom of page 3 includes numerous codes for environmental conditions and driver actions. These codes cover road terrain (straight, curve, hill), weather (clear, rain, snow), light conditions (daylight, dusk/dawn, darkness), road surface condition (dry, wet, icy) and what the drivers were doing at the time of the crash (stopped, turning, changing lanes). The coding sheet accompanying the MV 4000 explains each number. By standardizing environmental factors, WisDOT can analyze trends—such as increases in crashes on wet curves or intersections with poor lighting—and target countermeasures.
Page 4 – Contributing factors and commercial vehicles
The top of page 4 contains the investigating officer's opinion of possible contributing factors. These factors fall into three categories: driver factors (exceeding the speed limit, inattentive driving, following too closely), vehicle factors (mechanical problems with brakes, tires or steering) and highway factors (snow or ice on the road, loose gravel, potholes or other hazards). Officers select codes from the sheet to indicate which factors contributed to the crash. Insurance adjusters closely review these codes when determining fault and liability. The officer's name and contact information are repeated on this page for convenience. The bottom of page 4 documents any commercial vehicles involved. This section asks whether a bus, tractor‑trailer, log truck or other commercial vehicle was part of the crash. If so, the report lists the carrier's name, address and contact information, along with details about hazardous materials. When hazardous materials are involved, specialized response teams may be needed and federal reporting requirements apply. Because commercial vehicle crashes often result in severe injuries and significant property damage, documenting this information ensures regulatory compliance and supports insurance investigations.
Code sheet and supplemental forms
The MV 4000 relies on a code sheet to translate observations into standardized data. Codes represent road conditions, vehicle movements, driver actions, contributing factors and environmental conditions. Officers use the code sheet while completing the report to ensure accuracy and consistency. If the crash involves more than two vehicles or numerous passengers, additional pages (sometimes called MV 4000A) can be attached. These supplements mirror the structure of the main form, ensuring that all individuals and vehicles are properly documented.
Use cases
Law enforcement and crash reconstruction
Police officers use the MV 4000 to reconstruct crashes and determine whether any laws were violated. The first harmful event, manner of collision and contributing factor codes help investigators identify the primary cause. Driver action codes reveal whether speeding, distraction or impairment played a role. The diagram and narrative support a chronological understanding of events. When necessary, officers may consult witness statements or contact information from the report to gather additional evidence. Consistent reporting across agencies allows the Wisconsin State Patrol to compare crashes statewide and to allocate enforcement resources effectively.
Insurance claims and legal proceedings
Insurers depend on accident reports to assess liability and process claims. The MV 4000 provides objective details about the drivers, vehicles, injuries and contributing factors. Adjusters review the narrative and diagram to verify that the claimed damage aligns with the events described. If commercial vehicles are involved, the carrier information on page 4 ensures that proper insurance coverage is identified. Attorneys representing injured parties use the report's codes and narrative to argue negligence, while defense attorneys may scrutinize the report for inconsistencies or missing information that could reduce liability. The structured design of the MV 4000 makes it easier for all parties to understand and interpret the data.
Transportation planning and engineering
The Wisconsin Department of Transportation analyzes crash reports to identify safety problems and plan improvements. By aggregating data on crash types, environmental conditions and contributing factors, engineers can pinpoint hazardous intersections or road segments. For example, if the code for rear‑end collisions appears frequently on a particular stretch of highway, signal timing or signage may need adjustment. Weather and road surface codes help officials anticipate crash risks during winter storms and deploy de‑icing or plowing resources accordingly. The data also support grant applications and performance evaluations for federal safety programs.
Public health and research
Researchers and public health officials study crash reports to understand injury patterns and evaluate safety campaigns. Passenger data on page 1 and page 2 provide insight into seat belt use, airbag deployment and ejection rates. If data show a high incidence of unbelted passengers, targeted enforcement and education campaigns can be developed. The influence of alcohol and drugs on driver actions is documented on page 2, helping health agencies tailor substance abuse prevention efforts. Because the MV 4000 has been in use for many years, researchers can conduct longitudinal studies to assess the impact of safety interventions and legislative changes.
Conclusion
The Wisconsin Motor Vehicle Accident Report (MV 4000) is more than just paperwork; it is a vital tool for ensuring accountability and improving road safety. By standardizing the collection of data about crashes, the form enables law enforcement, insurers, engineers, attorneys and researchers to work from the same factual record. The structured fields capture everything from basic location and time information to detailed codes describing driver actions, environmental conditions and contributing factors. The diagram and narrative provide context that supports legal and insurance decisions, while the code sheet allows for consistent data entry and analysis. In a state with varied terrain and weather, this uniform reporting system helps protect drivers and passengers and guides investment in safer roads.
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All 791 Cities Available
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Milwaukee
County: Milwaukee
Population: 1.290.221
ZIP Codes: 53203, 53202, 53207...
Madison
County: Dane
Population: 460.255
ZIP Codes: 53706, 53704, 53705...
Appleton
County: Outagamie
Population: 234.701
ZIP Codes: 54914, 54915, 54913...
Green Bay
County: Brown
Population: 227.679
ZIP Codes: 54304, 54303, 54302...
Racine
County: Racine
Population: 135.512
ZIP Codes: 53405, 53404, 53406...
Kenosha
County: Kenosha
Population: 125.807
ZIP Codes: 53144, 53140, 53142...
Eau Claire
County: Eau Claire
Population: 108.477
ZIP Codes: 54703, 54701, 54702
La Crosse
County: La Crosse
Population: 93.163
ZIP Codes: 54603, 54601, 54602
Oshkosh
County: Winnebago
Population: 75.850
ZIP Codes: 54985, 54904, 54901...
Janesville
County: Rock
Population: 74.640
ZIP Codes: 53545, 53546, 53548...
Waukesha
County: Waukesha
Population: 70.779
ZIP Codes: 53186, 53188, 53189...
West Allis
County: Milwaukee
Population: 59.588
ZIP Codes: 53219, 53214, 53227
Wauwatosa
County: Milwaukee
Population: 47.718
ZIP Codes: 53213, 53225, 53226...
Fond du Lac
County: Fond du Lac
Population: 44.491
ZIP Codes: 54937, 54935, 54936
Brookfield
County: Waukesha
Population: 41.592
ZIP Codes: 53005, 53045, 53008
New Berlin
County: Waukesha
Population: 40.384
ZIP Codes: 53146, 53151
Menomonee Falls
County: Waukesha
Population: 38.963
ZIP Codes: 53051, 53052
Greenfield
County: Milwaukee
Population: 37.361
ZIP Codes: 53221, 53220, 53228
West Bend
County: Washington
Population: 31.722
ZIP Codes: 53090, 53095
Fitchburg
County: Dane
Population: 31.566
ZIP Codes: 53575, 53719, 53711...
Mount Pleasant
County: Racine
Population: 27.694
ZIP Codes: 53405, 53406, 53403...
Stevens Point
County: Portage
Population: 25.497
ZIP Codes: 54481, 54482
Caledonia
County: Racine
Population: 25.292
ZIP Codes: 53405, 53404, 53406...
Pleasant Prairie
County: Kenosha
Population: 21.515
ZIP Codes: 53142, 53158
Germantown
County: Washington
Population: 20.940
ZIP Codes: 53076, 53022
South Milwaukee
County: Milwaukee
Population: 20.547
ZIP Codes: 53172
Fox Crossing
County: Winnebago
Population: 18.960
ZIP Codes: 54952, 54956
Wisconsin Rapids
County: Wood
Population: 18.756
ZIP Codes: 54495, 54494
Ashwaubenon
County: Brown
Population: 16.931
ZIP Codes: 54304, 54115, 54313
Whitefish Bay
County: Milwaukee
Population: 14.750
ZIP Codes: 53217, 53211
Chippewa Falls
County: Chippewa
Population: 14.643
ZIP Codes: 54729, 54774
Salem Lakes
County: Kenosha
Population: 14.521
ZIP Codes: 53168, 53192, 53179...
Harrison
County: Calumet
Population: 13.345
ZIP Codes: 54952, 54169, 54130...
Glendale
County: Milwaukee
Population: 13.134
ZIP Codes: 53209, 53217, 53212
Greenville
County: Outagamie
Population: 12.911
ZIP Codes: 54942, 54944, 54914
Brown Deer
County: Milwaukee
Population: 12.615
ZIP Codes: 53209, 53223
Port Washington
County: Ozaukee
Population: 12.569
ZIP Codes: 53074, 53024
Fort Atkinson
County: Jefferson
Population: 12.490
ZIP Codes: 53538
Little Chute
County: Outagamie
Population: 11.930
ZIP Codes: 54140, 54913, 54911
Richfield
County: Washington
Population: 11.806
ZIP Codes: 53076, 53033, 53017
Village of Waukesha
County: Waukesha
Population: 8.479
ZIP Codes: 53189
Somers
County: Kenosha
Population: 8.245
ZIP Codes: 53144, 53140, 53177...
Sheboygan Falls
County: Sheboygan
Population: 8.190
ZIP Codes: 53085
Lake Hallie
County: Chippewa
Population: 7.245
ZIP Codes: 54729, 54703
Delafield
County: Waukesha
Population: 7.192
ZIP Codes: 53018, 53058, 53029
Prairie du Chien
County: Crawford
Population: 5.471
ZIP Codes: 53821
North Fond du Lac
County: Fond du Lac
Population: 5.373
ZIP Codes: 54937
Lake Wisconsin
County: Columbia
Population: 5.051
ZIP Codes: 53955, 53578, 53555
Okauchee Lake
County: Waukesha
Population: 4.827
ZIP Codes: 53069, 53066
West Milwaukee
County: Milwaukee
Population: 4.064
ZIP Codes: 53219, 53214, 53215...
Rochester
County: Racine
Population: 3.780
ZIP Codes: 53167, 53105, 53138
Combined Locks
County: Outagamie
Population: 3.633
ZIP Codes: 54113
Lake Delton
County: Sauk
Population: 3.522
ZIP Codes: 53965, 53913, 53940
Black River Falls
County: Jackson
Population: 3.514
ZIP Codes: 54615
Johnson Creek
County: Jefferson
Population: 3.367
ZIP Codes: 53094, 53038
Yorkville
County: Racine
Population: 3.237
ZIP Codes: 53177, 53126, 53182
New Holstein
County: Calumet
Population: 3.104
ZIP Codes: 53061, 53062
Wisconsin Dells
County: Columbia
Population: 2.763
ZIP Codes: 53965
Shorewood Hills
County: Dane
Population: 2.067
ZIP Codes: 53705, 53791
Campbellsport
County: Fond du Lac
Population: 2.053
ZIP Codes: 53010
Legend Lake
County: Menominee
Population: 1.478
ZIP Codes: 54135, 54124
Independence
County: Trempealeau
Population: 1.477
ZIP Codes: 54773, 54747, 54612
St. Peter
County: Fond du Lac
Population: 1.403
ZIP Codes: 54937, 53049
Powers Lake
County: Kenosha
Population: 1.378
ZIP Codes: 53128, 53159
Lauderdale Lakes
County: Walworth
Population: 1.337
ZIP Codes: 53121
Newburg
County: Washington
Population: 1.285
ZIP Codes: 53090, 53095, 53060
Little Round Lake
County: Sawyer
Population: 1.233
ZIP Codes: 54843
Butte des Morts
County: Winnebago
Population: 1.053
ZIP Codes: 54927, 54986, 54904
Lake Koshkonong
County: Jefferson
Population: 983
ZIP Codes: 53538
Stockbridge
County: Calumet
Population: 791
ZIP Codes: 53014, 53088, 54129
Lake Ivanhoe
County: Walworth
Population: 764
ZIP Codes: 53128, 53105
Oconomowoc Lake
County: Waukesha
Population: 699
ZIP Codes: 53066
Francis Creek
County: Manitowoc
Population: 683
ZIP Codes: 54220, 54214
Taycheedah
County: Fond du Lac
Population: 682
ZIP Codes: 54937, 54935
Forest Junction
County: Calumet
Population: 655
ZIP Codes: 54110, 54123
Sextonville
County: Richland
Population: 435
ZIP Codes: 53556, 53584, 53581
Amherst Junction
County: Portage
Population: 334
ZIP Codes: 54407
Pigeon Falls
County: Trempealeau
Population: 327
ZIP Codes: 54773, 54758, 54760
Briggsville
County: Marquette
Population: 303
ZIP Codes: 53901, 53920
Lac La Belle
County: Waukesha
Population: 277
ZIP Codes: 53036, 53066
Kellnersville
County: Manitowoc
Population: 264
ZIP Codes: 54247, 54215
Lake Lorraine
County: Walworth
Population: 251
ZIP Codes: 53190, 53115
Doylestown
County: Columbia
Population: 195
ZIP Codes: 53960, 53928, 53925
Mount Sterling
County: Crawford
Population: 182
ZIP Codes: 54631, 54645
Allens Grove
County: Walworth
Population: 177
ZIP Codes: 53114, 53525
Harrisville
County: Marquette
Population: 169
ZIP Codes: 53964, 53949
Big Foot Prairie
County: Walworth
Population: 159
ZIP Codes: 53184
Showing top 20 cities by population. All 791 cities have dedicated pages.