BJS: Bureau of Justice Statistics

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Law Enforcement
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Law enforcement describes the individuals and agencies responsible for enforcing laws and maintaining public order and public safety. Law enforcement includes the prevention, detection, and investigation of crime, and the apprehension and detention of individuals suspected of law violation.

The Bureau of Justice Statistics' Law Enforcement Unit maintains more than a dozen national data collections, covering federal, state, and local law enforcement agencies and special topics in law enforcement. Most data collections are conducted every 2 to 4 years and focus on aggregate or agency-level responses, meaning the information that is collected pertains to units, such as police departments, training academies, and crime labs. The data from law enforcement agencies provide national estimates for personnel, equipment, operations, agency policies, budgets, and job functions across agencies.

Data Collections & Surveys

Publications & Products

Selected Findings from the FBI's Uniform Crime Reporting Program This report presents statistics on crimes known to law enforcement that were voluntarily reported to the FBI's Uniform Crime Reporting Program.
  Full report (PDF 523K) | Data tables (Zip format 12K)

Law Enforcement Officers Killed and Assaulted, 2019 - Tables These tables are based on data from the Federal Bureau of Investigation, Law Enforcement Officers Killed and Assaulted (LEOKA) data collection.
  Full report (PDF 183K)

Offenses Known to Law Enforcement in Large Cities, 2018 FBI reported crime data for large cities of 250,000 population or more.
  Full report (PDF 1.1M)

Federal Law Enforcement Officers, 2016 - Statistical Tables Provides information on the approximately 132,000 full-time federal law enforcement officers employed by 83 federal agencies.
  Full report (PDF 482K) | Data tables (Zip format 13K)
Part of the Federal Law Enforcement Officers Series

Sheriffs' Offices, 2016: Personnel Provides personnel information on the approximately 3,000 sheriffs' offices in the United States.
  Summary (PDF 297K) | Full report (PDF 424K) | Data tables (Zip format 23K)
Part of the Sheriffs' Office Series

Local Police Departments, 2016: Personnel Provides personnel information on the approximately 12,300 local police departments in the United States.
  Summary (PDF 550K) | Full report (PDF 854K) | Data tables (Zip format 33K)
Part of the Local Police Departments Series

Arrest-Related Deaths Program: Pilot Study of Redesigned Survey Methodology Presents the methodology and findings from a pilot study that used a combination of open-source news searches and a survey of law enforcement agencies and medical examiners' and coroners' offices to identify deaths that occurred in the process of arrest by law enforcement officials.
  Full report (PDF 435K) | Data tables (Zip format 17K)
Part of the Arrest-Related Deaths Series

Body-Worn Cameras in Law Enforcement Agencies, 2016 Presents data on body-worn camera (BWCs) use and non-use in general-purpose law enforcement agencies for 2016.
  Press Release (251K) | Summary (PDF 209K) | Full report (PDF 484K) | Data tables (Zip format 29K)

Contacts Between Police and the Public, 2015 Presents data on the nature and frequency of contact between police and U.S. residents age 16 or older, including demographic characteristics of residents, the reason for and outcomes of the contact, police threats or use of nonfatal force, and residents' perceptions of police behavior during the contact.
  Press Release (95K) | Summary (PDF 124K) | Full report (PDF 577K) | Data table (Zip format 49K)
Part of the Contacts between Police and the Public Series

  Press Release (141K)

Terms & Definitions

Chemical agents A chemical compound which has deleterious effects on human health. There are a number of different types of chemical agents, and a range of uses for these compounds, from crowd control to chemical warfare.
Cross deputization agreements Allow law enforcement personnel from state and tribal entities to cross jurisdictions in criminal cases. Cross deputization agreements have been used to enhance law enforcement capabilities in areas were state and tribal lands were contiguous and intermingled. Under some agreements, federal, state, county/local, and/or tribal law enforcement officers have the power to arrest Indian and non-Indian wrongdoers wherever the violation of law occurs.
DNA The abbreviation for deoxyribonucleic acid, which is the genetic material present in the cells of all living organisms. DNA is the fundamental building block for an individual's entire genetic makeup. A person's DNA is the same in every cell (with a nucleus). DNA is contained in blood, semen, skin cells, tissue, organs, muscle, brain cells, bone, teeth, hair, saliva, mucus, perspiration, fingernails, urine, feces, etc.
Law enforcement The generic name for the activities of the agencies responsible for maintaining public order and enforcing the law, particularly the activities of prevention, detection, and investigation of crime and the apprehension of criminals.
Less-lethal weapons Less-lethal technologies give police an alternative to lethal force. These weapons are especially valuable when lethal force (1) is not necessary, (2) is justified and available for backup, but lesser force may resolve the situation, or (3) is justified, but its use could cause serious injury to bystanders or other unacceptable collateral effects. The weapons currently in use include chemical agents, batons, soft projectiles, and electrical devices, such as stun guns and Tasers.
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