Here, you can quantitatively understand how crime has changed in recent
years. The website will generate statistics on changes in crime based on
the chosen categories, cities, and date ranges. If you would like to
visualize the data instead, return to our
home page. For help
on how to use this website, please visit our how-to page
Click the dropdown menus below to choose select a crime category, city,
and date ranges to genreate the summary statisitcs. The website will
display the percent and overall change in the averages of the selected date
range and the same date range in the baseline years. If no baseline years are
selected, the change between those two dates in the range will be displayed.
Data for the most recent months may be inaccurate or unavailable due to lag
in data reporting.
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The displayed data is collected from open data sources and data requests sent to specific cities. Note the statisitcal calculations do not account for the seasonality of crime. Data has been cleaned but may still contain errors. Certain reports have been dropped that are not related to the crime categories presented above. Data has also been restricted for categorical consistency across years. When necessary, crime incidents and arrests have been classified manually on that basis of “crime description”, “weapon”, “victim”, and “premises” fields. Finally, many cities release data that is subsequently audited and updated. This means that very recent data may not be accurate. Below are data definitions.
Types of Measurements
Reflects crimes reported to the relevant Police department and are categorized based upon the classifications ascribed by police at the time of reporting. Depending on the city, this will include both Part I and Part II Uniform Crime Report offenses. Certain offense types will often be excluded from the data such as crimes of a sexual nature or those involving juveniles.
Arrest reports in the relevant city. There are plotted based upon the date of the arrest where available, and otherwise plotted based upon the date of the crime for which the arrest was made.
Brief detainment of an individual on the basis of reasonable suspicion of involvement in criminal activity.
The temporary detention of a driver of a vehicle to investigate either a possible crime or a minor legal violation.
An unadjusted count of the data.
The count per 100,000 residents of the city.
7 Day MA
A smoothed version of the data taking a 7 day simple moving average to make it easier to see the trend in the data
Indicates stops where contraband was found on the person (or in the vehicle). This includes both drugs and weapons.
Indicates stops where the officer frisked the individual. This is generally done to detect weapons.
Indicates stops where the officer searched the individual (or vehicle). This is more involved than a frisk.
Murders and manslaughters.
Burglaries, all thefts, and arson.
Murder, manslaughter, aggravated assault, rape (not statutory) and robbery (with and without a firearm).
Motor Vehicle Theft
Unauthorized use of a vehicle including car, bus, or truck.
Any acts involving sexual penetration, where possible statutory rape has been excluded.
Theft from Auto
Theft of goods from a vehicle.
Burglary of houses and apartments.
Burglary of commercial premises, including stores, movie theatres and banks.
Theft of personal property that does not include robberies, burglary, or theft of motor vehicles.
Includes any violence, abuse, or threats against a relationship partner, child, or dependent adult.
The number of confirmed cases of COVID-19 within the respective county.
The number of deaths official attributed to COVID-19 within the respective county.
Mobility trends for places restaurants, cafes, shopping centers, theme parks, museums, libraries, movie theatres, and other similar locations. Measured in total visitors.
Mobility trends for grocery markets, food warehouses, farmers markets, specialty food shops, drug stores, pharmacies, and other similar locations. Measured in total visitors.
Mobility trends for local parks, national parks, public beaches, marinas, dog parks, plazas, public gardens, and other similar locations. Measured in total visitors.
Mobility trends for public transport hubs such as subway, bus, and train stations. Measured in total visitors.
Mobility trends for places of work. Measured in total visitors.
Mobility trends for places of residence. Measured in terms of duration in the location.
Data Sources and Notes
Data comes from Google Community Mobility Reports. This data is collected at the county level. Data is recorded as a percentage change relative to a baseline, which is the median value for a given day of the week during the period from January 3rd to February 6th. These changes are separated by the category of the location.
Some cities, such as Houston, changed the crime categories reported, so there may exist some gaps in the data to maintain consistency. The most recent statistics may not be reliable because it takes time to update the data.
Data on this site comes from research led by
David Abrams, with assistance from Priyanka Goonetilleke, Elizabeth Holmdahl and
Bridget Brody. Please cite this URL when using figures or data. Site
designed and built by
Kathy Qian and David