The Source for Crime and Justice Data

National Incident-Based Reporting System, 2011: Extract Files (ICPSR 34603)

Alternate Title:  NIBRS, 2011

Principal Investigator(s): National Archive of Criminal Justice Data


The National Incident-Based Reporting System (NIBRS) is a part of the Uniform Crime Reporting Program (UCR), administered by the Federal Bureau of Investigation (FBI). The extract files version of NIBRS was created to simplify working with NIBRS data. Data management issues with NIBRS are significant, especially when two or more segment levels are being merged. These issues require skills separate from data analysis. NIBRS data as formatted by the FBI are stored in a single file. These data are organized by various segment levels (record types). There are six main segment levels: administrative, offense, property, victim, offender, and arrestee. Each segment level has a different length and layout. There are other segment levels that occur with less frequency than the six main levels. Significant computing resources are necessary to work with the data in its single-file format. In addition, the user must be sophisticated in working with data in complex file types. For these reasons and the desire to facilitate the use of NIBRS data, ICPSR created the extract files. The data are not a representative sample of crime in the United States.

Series: National Incident-Based Reporting System (NIBRS) Series

Access Notes

  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.


DS0:  Study-Level Files
DS1:  Incident-Level File - Download All Files (279.144 MB) large file
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DS2:  Victim-Level File - Download All Files (259.816 MB) large file
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DS3:  Offender-Level File - Download All Files (295.729 MB) large file
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DS4:  Arrestee-Level File - Download All Files (3612.318 MB) large file
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Study Description


National Archive of Criminal Justice Data. National Incident-Based Reporting System, 2011: Extract Files. ICPSR34603-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2014-01-03.

Persistent URL:

Export Citation:

  • RIS (generic format for RefWorks, EndNote, etc.)
  • EndNote XML (EndNote X4.0.1 or higher)


This study was funded by:

  • United States Department of Justice. Office of Justice Programs. Federal Bureau of Investigation

Scope of Study

Subject Terms:   arrests, crime, crime rates, crime reporting, law enforcement agencies, national crime statistics (USA), offenders, offenses, property crime, Uniform Crime Reports, victims, violent crime

Smallest Geographic Unit:   city

Geographic Coverage:   United States

Time Period:  

Date of Collection:  

Unit of Observation:   Dataset one - Incident, Dataset two - Victim, Dataset three - Offender, Dataset four - Arrestee

Universe:   Law enforcement agencies in the United States participating in the National Incident-Based Reporting System.

Data Types:   event/transaction data


Time Method:   Cross-sectional

Mode of Data Collection:   record abstracts

Extent of Processing:  ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Created variable labels and/or value labels.
  • Standardized missing values.
  • Performed recodes and/or calculated derived variables.
  • Checked for undocumented or out-of-range codes.


Original ICPSR Release:   2014-01-03

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