Chicago Police Department Data

Chicago Police Department (CPD)

Data collected by the Chicago Police Department (CPD) include arrests and crime incidents reported to CPD. Arrest data include a record of each arrest with arrestee identifying information and charge description. Crime incident data include date and time of crime incident, along with crime type and charge description. CPD maintains victimization data generated when a victim reports a crime, including the date and time of the crime incident and identifying information about the victim.

Unit of Observation:
Individual arrest; individual report; individual crime incident
Personally Identifiable Information Available for Linking:
Chicago, Illinois, United States of America
Years Available:
1965 – present. Historical data include aggregated reports. Individual incident reports are available from 2001 to present. A summary of historical reports from CPD can be found on the statistical request guidelines.
Frequency of Updates:
Daily with a 7-day lag. Frequency of updates and lag time for non-public data is unknown.

Records covering all crime reported to the Chicago Police Department, including incident reports and arrests


Chicago Police Department (CPD) data include many publicly available resources, along with non-public data that can be made available to researchers upon request. To access non-public data, researchers must clearly define their request and the purpose of their research in a statistical request form.

Researchers are advised to thoroughly explore publicly available data from CPD before submitting a request for non-public data. Public data include incident reports with partially redacted locations of crime incidents, identified adult arrest records, and gun and sex offender registries.

Timeline for Access


Lag Time

It takes up to 90 days for the review of the application. Public data are updated daily with a seven day lag. Lag time for non-public data is unknown.




Options and processes for linking are unknown.

Identifiers Available for Linking

  • First name and last name
  • Date of birth

Data Contents

Partial List of Variables

Incident reports (public): date and time of crime incident, crime incident type, charge description, FBI code

Incident reports (not public): exact location of crime incident

Arrest data (public): adult arrestee first and last name, adult arrestee age, arrest charge description

Arrest data (not public): juvenile first and last name, juvenile date of birth, unique ID associated with arrestee fingerprint

Victimization data (not public): victim first and last name, victim date of birth, crime incident type and charge description

J-PAL Randomized Evaluations Using this Data Set

Cook, Philip J., Dodge, Kenneth, Farkas, George, Fryer, Roland G., Guryan, Jonathan, Ludwig, Jens, Mayer, Susan, Pollack, Harold, and Laurence Steinberg. 2015. “Not Too Late: Improving Academic Outcomes for Disadvantaged Youth.” Northwestern University Institute for Policy Research Working Paper Series.

Heller, Sara B. 2014. “Summer Jobs Reduce Violence Among Disadvantaged Youth.” Science 346(6214) 1219-1223.

Heller, Sara B., Shah, Anuj K., Guryan, Jonathan, Ludwig, Jens, Mullainathan, Sendhil, Pollack, Harold A. 2017. “Thinking, Fast and Slow? Some Field Experiments to Reduce Crime and Dropout in Chicago.” The Quarterly Journal of Economics 132(1): 1-54.

Jacob, Brian A., Kapustin, Max, Ludwig, Jens. 2015. “The Impact of Housing Assistance on Child Outcomes: Evidence from a Randomized Housing Lottery.” The Quarterly Journal of Economics 130(1): 465-506.

Other Documentation

Heller, Sara B. 2014. “Supplementary Material for Summer Jobs Reduce Violence Among Disadvantaged Youth.” Science 346(6214): 1219-1223.  

Last reviewed