United States Federal Law Enforcement Agencies

A federal law enforcement agency is an organizational unit, or subunit, of the federal government with the principle functions of prevention, detection, and investigation of crime and the apprehension of alleged offenders. Listed below are all 73 federal agencies that employ full-time officers with federal arrest authority who are also authorized (but not necessarily required) to carry firearms while on duty.

Of the 73 agencies, 33 of the 69 Offices of Inspector General also employ criminal investigators with arrest authority and authorization to carry firearms.

Department of Agriculture

Agency Officers (2012) Description/Duties
U.S. Forest Service, Law Enforcement and Investigations Organization 648 Uniformed law enforcement rangers enforce federal laws and regulations governing National Forest lands and resources. Special agents are criminal investigators who investigate crimes against property, visitors, and employees.  

Department of Commerce

Agency Officers (2012) Description/Duties
Bureau of Industry and Security, Office of Export Enforcement 103 Special agents conduct investigations of alleged or suspected violations of dual-use export control laws.  
National Institute of Standards and Technology Police 28 Officers provide law enforcement and security services for NIST facilities.  
National Oceanic and Atmospheric Administration, Office of Law Enforcement 154 Special agents and enforcement officers enforce laws that conserve and protect living marine resources and their natural habitat in the U.S. Exclusive Economic Zone, which covers ocean waters between 3 and 200 miles off shore and adjacent to all U.S. states and territories. 

Department of Defense

Agency Officers (2012) Description/Duties
Pentagon Force Protection Agency 725 Officers provide law enforcement and security services for the occupants, visitors, and infrastructure of the Pentagon, Navy Annex, and other assigned Pentagon facilities. 

Department of Energy

Agency Officers (2012) Description/Duties
National Nuclear Security Administration, Office of Secure Transportation 363 Special agents, known as nuclear materials couriers, ensure the safe and secure transport of government-owned special nuclear materials during classified shipments in the contiguous United States.  

Department of Health and Human Services

Agency Officers (2012) Description/Duties
National Institutes of Health, Division of Police 94 Officers provide law enforcement and security services for NIH facilities.  
U.S. Food and Drug Administration, Office of Criminal Investigations 187 Special agents investigate suspected criminal violations of the Federal Food, Drug, and Cosmetic Act and other related Acts; the Federal Anti-Tampering Act; and other statutes, including applicable Title 18 violations of the United States Code.  

Department of Homeland Security

Agency Officers (2012) Description/Duties
Federal Emergency Management Agency, Security Branch 84 Officers are responsible for the protection of FEMA facilities, personnel, resources, and information. 
U.S. Customs and Border Protection 37,482 CBP officers protect U.S. borders at official ports of entry. Border patrol agents prevent illegal entry of people and contraband between the ports of entry. Air and marine officers patrol the nation’s land and sea borders to stop terrorists and drug smugglers. 
U.S. Immigration and Customs Enforcement 12,679 Special agents conduct investigations involving national security threats, terrorism, drug smuggling, child exploitation, human trafficking, illegal arms export, financial crimes, and fraud. Uniformed immigration enforcement agents perform functions related to the investigation, identification, arrest, prosecution, detention, and deportation of aliens, as well as the apprehension of absconders.  
U.S. Secret Service 5,226 Special agents have investigation and enforcement duties primarily related to counterfeiting, financial crimes, computer fraud, and threats against dignitaries. Uniformed Division officers protect the White House complex and other Presidential offices, the main Treasury building and annex, the President and Vice President and their families, and foreign diplomatic missions.  

Department of Interior

Agency Officers (2012) Description/Duties
Bureau of Indian Affairs, Division of Law Enforcement 277 Officers provide law enforcement services in some tribal areas. In addition to providing direct oversight for these bureau-operated programs, the division also provides technical assistance and some oversight to tribally operated law enforcement programs. 
Bureau of Land Management, Law Enforcement 255 Law enforcement rangers conduct patrols, enforce federal laws and regulations, and provide for the safety of BLM employees and users of public lands. Special agents investigate illegal activity on public lands. 
National Park Service, United States Park Police 580 Officers provide law enforcement services to designated National Park Service areas (primarily in the Washington, D.C., New York City, and San Francisco metropolitan areas). Officers are authorized to provide services for the entire National Park System. 
National Park Service, Visitor and Resource Protection Division 1,416 Park rangers, commissioned as law enforcement officers, provide law enforcement services for the National Park System. Additional rangers serving seasonally are commissioned officers but are considered part-time and not included in the FLEO census.  
U.S. Bureau of Reclamation, Hoover Dam Police 21 Officers provide security and law enforcement services for the Hoover Dam and the surrounding 22-square-mile security zone.  
U.S. Fish and Wildlife Service, Office of Law Enforcement 603 Special agents enforce federal laws that protect wildlife resources, including endangered species, migratory birds, and marine mammals. 

Department of Judicial

Agency Officers (2012) Description/Duties
Administrative Office of the U.S. Courts 4,767 Federal probation officers supervise offenders on probation and supervised release. In seven federal judicial districts, probation officers are not authorized to carry a firearm while on duty and are excluded from FLEO officer counts.  
U.S. Supreme Court Police 139 Officers provide law enforcement and security services for Supreme Court facilities. 

Department of Justice

Agency Officers (2012) Description/Duties
Bureau of Alcohol, Tobacco, Firearms and Explosives 2,562 Special agents enforce federal laws related to the illegal use and trafficking of firearms, the illegal use and storage of explosives, acts of arson and bombings, acts of terrorism, and the illegal diversion of alcohol and tobacco products.  
Drug Enforcement Administration 4,388 Special agents investigate major narcotics violators, enforce regulations governing the manufacture and dispensing of controlled substances, and perform other functions to prevent and control drug trafficking. 
Federal Bureau of Investigation 12,925 Special agents are responsible for criminal investigation and enforcement related to more than 200 categories of federal law. Criminal priorities include public corruption, civil rights violations, organized crime, white-collar crime, violent crime, and major theft. FBI police officers provide law enforcement and security for FBI facilities.  
Federal Bureau of Prisons 16,993 Correctional officers enforce the regulations governing the operation of BOP correctional institutions, serving as both supervisors and counselors of inmates. They are normally not armed while on duty. Most other BOP employees have arrest and firearm authority to respond to emergencies. 
U.S. Marshals Service 3,359 The agency receives all persons arrested by federal agencies and is responsible for their custody and transportation until sentencing. Deputy marshals provide security for federal judicial facilities and personnel.  

Department of Legislative

Agency Officers (2012) Description/Duties
Library of Congress Police 85 Officers provided law enforcement and security services for Library of Congress facilities. On October 1, 2009, the agency ceased operations and its personnel, duties, responsibilities, and functions were transferred to the U.S. Capitol Police. 
U.S. Capitol Police 1,637 Officers provide law enforcement and security services for the U.S. Capitol grounds and buildings, and in the zone immediately surrounding the Capitol complex. The U.S. Capitol Police assumed the duties of the Library of Congress Police on October 1, 2009. 
U.S. Government Printing Office, Uniformed Police Branch 41 Officers provide law enforcement and security services for facilities where information, products, and services for the federal government are produced and distributed. 

Department of State

Agency Officers (2012) Description/Duties
Bureau of Diplomatic Security 1,049 In the U.S., special agents protect the secretary of state, the U.S. ambassador to the United Nations, and visiting foreign dignitaries below the head-of-state level. They also investigate passport and visa fraud. 

Department of Treasury

Agency Officers (2012) Description/Duties
Bureau of Engraving and Printing Police 207 Officers provide law enforcement and security services for facilities in Washington, D.C., and Fort Worth, Texas, where currency, securities, and other official U.S. documents are made. 
Internal Revenue Service, Criminal Investigation Division 2,655 Special agents have investigative jurisdiction over tax, money laundering, and Bank Secrecy Act laws.  
United States Mint Police 316 Officers provide law enforcement and security services for employees, visitors, government assets stored at U.S. Mint facilities in Philadelphia, PA; San Francisco, CA; West Point, NY; Denver, CO; Fort Knox, KY; and Washington, D.C.  

Department of Veterans Affairs

Agency Officers (2012) Description/Duties
Veterans Health Administration, Office of Security and Law Enforcement 3,175 Officers provide law enforcement and security services for VA medical centers. 

Independent

Agency Officers (2012) Description/Duties
Amtrak Police 305 Officers provide law enforcement and security services for the passengers, employees, and patrons of the national railroad owned by the U.S. government and operated by the National Railroad Passenger Corporation. 
Federal Reserve Board Police 141 Officers provide law enforcement and security services for Federal Reserve facilities in Washington, D.C. 
National Aeronautics and Space Administration, Protective Services 62 Officers provide law enforcement and security services for NASA’s 14 centers located throughout the U.S. 
Smithsonian National Zoological Park Police 26 Officers provide security and law enforcement services for the Smithsonian Institution’s 163-acre National Zoological Park in Washington, D.C. 
Tennessee Valley Authority Police 145 Officers provide law enforcement and security services for TVA employees and properties, and users of TVA recreational facilities. 
U.S. Environmental Protection Agency, Criminal Enforcement 202 Special agents investigate suspected individual and corporate criminal violations of the nation’s environmental laws. 
U.S. Postal Inspection Service 2,324 Postal inspectors conduct criminal investigations covering more than 200 federal statutes related to the postal system. Postal police officers provide security for postal facilities, employees, and assets, as well as escort high-value mail shipments.  

Office of Inspector General

Agency Officers (2012) Description/Duties
Agency for International Development 13 The OIG Office of Investigations conducts worldwide investigations into allegations of criminal, civil, and administrative violations relative to the Agency for International Development 
Corporation for National and Community Service 9 OIG CNCS conducts investigations of Corporation programs and operations to prevent and deter waste, fraud and abuse. 
Department of Agriculture 164 OIG Investigations is the law enforcement arm of the Department, with Department-wide investigative jurisdiction. OIG Special Agents conduct investigations of significant criminal activities involving USDA programs, operations, and personnel, and are authorized to make arrests, execute warrants, and carry firearms. 
Department of Commerce 16 Dept of Commerce officers investigate alleged or suspected fraud, waste, abuse, and misconduct by Commerce employees, contractors, recipients of financial assistance, and others involved in the Department's programs and operations. 
Department of Defense 345 OIG DoD officers conduct highly relevant, objective, professional investigations of matters critical to DoD property, programs, and operations that provide for our national security with emphasis on life, safety, and readiness. 
Department of Education 85 OIG DoE officers investigate fraud, waste, or abuse involving U.S. Department of Education funds or programs  
Department of Energy 48 OIG DoE officers perform investigations into allegations of fraud, waste, and abuse in programs and operations of the Department of Energy, NNSA and FERC. 
Department of Health and Human Services 389 OIG has been at the forefront of the Nation's efforts to fight waste, fraud and abuse in Medicare, Medicaid and more than 300 other HHS programs. 
Department of Homeland Security 157 OIG DHS investigators identify and address fraud, abuse, mismanagement, and waste of taxpayer funds invested in Homeland Security. 
Department of Housing and Urban Development 228 This office enforces Federal laws against discrimination based on race, color, religion, national origin, sex, disability and familial status. 
Department of Justice 122 Officers investigate fraud, abuse, and misconduct in DOJ programs and personnel. 
Department of Labor 164 The OIG at DOL has the responsibility to investigate labor racketeering and/or organized crime influence involving unions, employee benefit plans, and labor-management relations. 
Department of State 32 OIG DoS Office of Investigations conducts investigations of criminal, civil, and administrative misconduct related to organizational programs and operations.  
Department of the Interior 66 OIG DoI officers investigate allegations of fraud, waste, abuse, or mismanagement resulting in significant financial loss to DOI; 
Department of the Treasury 21 OIG Dept of Treasury officers are responsible for investigating criminal activity and employee misconduct associated with the operations of the following Treasury Bureaus: United States Mint, Bureau of Engraving and Printing, Financial Management Service, Office of the Comptroller of the Currency, Bureau of the Public Debt, Financial Crimes Enforcement Network, Alcohol and Tobacco Tax and Trade Bureau, and Community Development Financial Institution Fund. 
Department of the Treasury, Tax Administration 302 TIGTA officers are committed to the prevention and detection of fraud, waste, and abuse within the IRS and related entities. 
Department of Transportation 94 The Office of Investigations is comprised of criminal and general investigators that are responsible for conducting criminal, civil, and administrative investigations of fraud and a variety of other allegations affecting DOT, its operating administrations, programs, and grantees (grant funds). 
Department of Veterans Affairs 132 he Office of Investigations (OI) investigates crimes committed against programs and operations of VA by employees and non-employees, as well as allegations of serious violations of policies and procedures by high-ranking members of the Department. 
Environmental Protection Agency 40 OIG EPA officers conduct investestigations of EPA and its contractors, to promote economy and efficiency, and to prevent and detect fraud, waste, and abuse.  
Federal Deposit Insurance Corporation 35 OIG FDIC is an independent unit that conducts audits, investigations, and other reviews of the Federal Deposit Insurance Corporation's (FDIC) programs and operations. 
General Services Administration 67 OIG GSA officers investigate fraud, waste, and mismanagement in the General Services Administration's (GSA) programs and operations. 
Government Printing Office 5 OIG GPO officers recommend policies to prevent and detect fraud, waste, abuse and mismanagement, as well as to promote economy, efficiency, and effectiveness in GPO's programs and operations.  
Library of Congress 2 OIG LoC officers assure that LoC's $750 million and 4,000 employees are held in check by investigating fraud, waste, abuse, and mismanagement within the Library. 
National Aeronautics and Space Administration 52 OIG NASA officers investigate allegations of crime, cyber-crime, fraud, waste, abuse, and misconduct having impact on NASA programs, projects, operations, and resources.  
National Archives and Records Administration 6 OIG NARA officers perform investigations of criminal, civil, and administrative misconduct related to NARA programs and operations. Investigations examine specific allegations, reports, or other information indicating possible violations of law or regulation. 
National Science Foundation 6 OIG NSF officers investigate fraud and waste within the NSF. 
Nuclear Regulatory Commission 13 OIG NRC officers detect fraud, waste, abuse, and mismanagement, and promote economy, efficiency, and effectiveness in NRC programs and operations.  
Office of Personnel Management 28 OIG is an independent office within the Office of Personnel Management (OPM) dedicated to investigating incidents both within and outside of the agency. 
Small Business Administration 34 The SBA Office of Inspector General mission is to provide independent, objective oversight to improve the integrity, accountability, and performance of the SBA and its programs for the benefit of the American people. 
Social Security Administration 230 OIG SSA special agents are responsible for investigating violations of the laws that govern Social Security programs. Special agents work in 66 offices across the United States. 
Tennessee Valley Authority 20 OIG TVA investigations include alleged contract fraud, financial fraud, healthcare fraud, workers' compensation fraud, and any other matter which could potentially affect TVA 
U.S. Postal Service 508 Officers have arrest authority as it relates to federal law violations and carry firearms. 
U.S. Railroad Retirement Board 16 OIG RRB investigators focuse their efforts on identifying, investigating, and presenting Railroad Retirement Board (RRB) benefit fraud cases for prosecution. 
Count: 73
Total: 121,877