Websites listed below contain crime and justice-related data. 
This list is not meant to be exhaustive; it lists the more commonly used and useful sites.
Data Archives
- Bureau of Justice Statistics - Data sets from the Bureau of Justice Statistics, the data-gathering and statistical unit of the U.S. Department of Justice.
- Federal Criminal Case Processing Statistics - Comprehensive information describing suspects and defendants processed in the federal criminal justice system. FCCPS can be used to analyze federal case processing data.
- Transactional Records Access Clearinghouse - Fee-based: $65.00 per month, personal subscription. Provides a vast range of data on federal enforcement activities -- criminal, civil, and administrative -- as well as detailed information about federal staffing, federal funds, and the diverse characteristics of counties, federal districts, and states.
Image source: Pearson Scott Foresman. Public domain. Wikimedia Commons.