A Guide to U.S. Statistics Sources: Crime and Criminal Justice Statistics

"DPIC produces groundbreaking reports on issues such as arbitrariness, costs, innocence, and racial disparities. DPIC also releases an annual year-end report highlighting significant developments and trends." [About the DIPC]

The Gun Violence Archive is an online archive of gun violence incidents collected from over 2,000 media, law enforcement, government and commercial sources daily in an effort to provide near-real time data about the results of gun violence. GVA in an independent data collection and research group with no affiliation with any advocacy organization.
Data back to 2014.
See also: Tool from The Guardian which maps 2015 data down to the tract level.

"Mass shootings, detailed. The Violence Project’s Mass Shooter Database contains extensive details about public mass shootings in the US and their perpetrators, weapons, and victims, with a goal of “finding pathways to prevention.” The database, funded by a National Institute of Justice grant, covers 170+ shootings between 1966 and early 2020. Examples of the variables include: the perpetrator’s employment status, known prejudices, and experience with mental illness; the victims’ relationship to the perpetrator and estimated years of life they lost; and the firearms’ make, model, and method of acquisition." [Description from Jeremy Singer-Vine's "Data is Plural" newsletter.

"NACJD hosts several large-scale datasets, including the National Crime Victimization Survey (NCVS), the FBI's Uniform Crime Reports (UCR), the FBI's National Incident-Based Reporting System (NIBRS), and the Project on Human Development in Chicago Neighborhoods (PHDCN). "

Archived in ICSPR's Data Lumos.

"Produces annual national- and state-level data on the number of prisoners in state and federal prison facilities. Aggregate data are collected on race and sex of prison inmates, inmates held in private facilities and local jails, system capacity, noncitizens, and persons age 17 or younger. Findings are released in the Prisoners series and the Corrections Statistical Analysis Tool (CSAT) - Prisoners. Data are from the 50 states departments of correction, the Federal Bureau of Prisons, and until 2001, from the District of Columbia (after 2001, felons sentenced under the District of Columbia criminal code were housed in federal facilities)."

Transactional Records Access Clearinghouse (TRAC) gathers, performs research, and distributes data about the activities of the federal enforcement and regulatory agencies. U.S. Customs Service, Federal Bureau of Investigation (FBI), Dept. of Homeland Security (DHS), Internal Revenue Service (IRS), Drug Enforcement Agency (DEA), the Bureau of Alcohol, Tobacco and Firearms (ATF), and the Immigration and Nationalization Serivce (INS).

Analyzing traffic stop data from across the country.

Under "Solutions and Research," Jail admissions ~ Jail incarceration ~ Pretrial jail incarceration ~ Prison incarceration for counties and states.

Corrections, Courts & Sentencing, Crime Type, Employment & Expenditure, Federal, Law Enforcement, and Victims.

A portal to a variety of US criminal justice statistics and publications. See: Open Data

The Office of Research and Data collects data from documents submitted by the courts in each case in which a defendant is sentenced. From that data, the Commission prepares and disseminates public reports on a wide variety of sentencing issues.

An inventory of public and privately-produced criminal justice data. It hasn't been updated in several years. Many, but not all, of these links are to federal, .gov sites.