The Department of the Treasury (USDT) is the national treasury and finance department of the federal government of the United States, where it serves as an executive department. The department oversees the Bureau of Engraving and Printing and the U.S. Mint. These two agencies are responsible for printing all paper currency and minting coins, while the treasury executes currency circulation in the domestic fiscal system. The USDT collects all federal taxes through the Internal Revenue Service; manages U.S. government debt instruments; licenses and supervises banks and thrift institutions; and advises the legislative and executive branches on matters of fiscal policy. The department is administered by the secretary of the treasury, who is a member of the Cabinet. The treasurer of the United States has limited statutory duties, but advises the Secretary on various matters such as coinage and currency production. Signatures of both officials appear on all Federal Reserve notes.
The Bureau of Engraving and Printing (BEP) is a government agency within the United States Department of the Treasury that designs and produces a variety of security products for the United States government, most notable of which is Federal Reserve Notes for the Federal Reserve, the nation's central bank. In addition to paper currency, the BEP produces Treasury securities; military commissions and award certificates; invitations and admission cards; and many different types of identification cards, forms, and other special security documents for a variety of government agencies. The BEP is one of two U.S. agencies in currency production in the case of printing paper currency; the other is the United States Mint, which mints coinage. With production facilities in Washington, D.C., and Fort Worth, Texas, the Bureau of Engraving and Printing is the largest producer of government security documents in the United States.
The United States Mint is a bureau of the Department of the Treasury responsible for producing coinage for the United States to conduct its trade and commerce, as well as controlling the movement of bullion. The U.S. Mint is one of two U.S. agencies that produce money in the case of minting coinage; the other is the Bureau of Engraving and Printing, which prints paper currency. The first United States Mint was created in Philadelphia in 1792, and soon joined by other centers, whose coins were identified by their own mint marks. There are currently four active coin-producing mints: Philadelphia, Denver, San Francisco, and West Point.
In the United States, a special agent is an official term used to refer to an investigator or detective for a federal or state government who primarily serves in criminal investigatory positions. Additionally, many federal and state special agents operate in "criminal intelligence" based roles as well. Within the U.S. federal law enforcement system, dozens of federal agencies employ federal law enforcement officers, each with different criteria pertaining to the use of the titles Special Agent and Agent. These titles are also used by many state level agencies to refer to their personnel.
Security police usually describes a law enforcement agency which focuses primarily on providing security and law enforcement services to particular areas or specific properties. They may be employed by governmental, public, or private institutions. Security police are generally considered distinct from security guards as security police personnel typically hold some level of law enforcement authority. The exact powers held by security police vary widely between jurisdictions. Examples of these types of agencies include the U.S. FBI Police, the Indian Central Industrial Security Force, and the British Civil Nuclear Constabulary.
Special police usually describes a police force or unit within a police force whose duties and responsibilities are significantly different from other forces in the same country or from other police in the same force, although there is no consistent international definition. A special constable, in most cases, is not a member of a special police force (SPF); in countries in the Commonwealth of Nations and often elsewhere, a special constable is a voluntary or part-time member of a national or local police force or a person involved in law enforcement who is not a police officer but has some of the powers of a police officer.
The Federal Protective Service (FPS) is a federal law enforcement agency of the United States Department of Homeland Security (DHS). It is also "the federal agency charged with protecting and delivering integrated law enforcement and security services to facilities owned or leased by the General Services Administration (GSA)"—over 9,000 buildings—and their occupants.
The Federal Law Enforcement Training Centers serves as an interagency law enforcement training body for 105 United States government federal law enforcement agencies. The stated mission of FLETC is to "...train those who protect our homeland". Through the Rural Policing Institute (RPI) and the Office of State and Local Training, it provides tuition-free and low-cost training to state, local, campus and tribal law enforcement agencies.
The Alaska State Troopers, officially the Division of Alaska State Troopers (AST), is the state police agency of the U.S. state of Alaska. It is a division of the Alaska Department of Public Safety (DPS). The AST is a full-service law enforcement agency that handles both traffic and criminal law enforcement. The AST is also involved in apprehending fugitives as part of the Alaska Fugitive Task Force, an inter-agency collaborative of Alaska police departments that cooperates with police agencies throughout the United States and less commonly with Interpol in apprehending wanted men and women. Unlike many lower 48 states, the AST also serves as Alaska’s primary environmental law enforcement agency; troopers assigned to the AST’s Division of Alaska Wildlife Troopers are known as "Alaska Wildlife Troopers" and primarily serve as game wardens, although they retain the same powers as other Alaskan state troopers.
The Port Authority of New York and New Jersey Police Department, or Port Authority Police Department (PAPD), is a law enforcement agency in New York and New Jersey, the duties of which are to protect and to enforce state and city laws at all the facilities, owned or operated by the Port Authority of New York and New Jersey (PANYNJ), the bi-state agency running airports, seaports, and many bridges and tunnels within the Port of New York and New Jersey. Additionally, the PAPD is responsible for other PANYNJ properties including three bus terminals, the World Trade Center in Lower Manhattan, and the PATH train system. The PAPD is the largest transit-related police force in the United States.
As of 2020, more than 800,000 sworn law enforcement officers have been serving in the United States. About 137,000 of those officers work for federal law enforcement agencies.
The Federal Reserve Police Department (FRPD) is the law enforcement unit of the Federal Reserve System, the central banking system of the United States.
The Kentucky State Police (KSP) is a department of the Kentucky Justice and Public Safety Cabinet, and the official State Police force of the Commonwealth of Kentucky, responsible for statewide law enforcement. The department was founded in 1948 and replaced the Kentucky Highway Patrol. The department's sworn personnel hold the title State Trooper, and its nickname is The Thin Gray Line.
The Amtrak Police Department (APD) is a federal railroad police department of Amtrak, the government-owned passenger train system in the United States. It is headquartered at Union Station in Washington, D.C., and as of 2023 has a force of 431 sworn police officers, most of whom are stationed within the Northeast Corridor, Amtrak's busiest route.
The Virginia Marine Police is the law enforcement division of the Virginia Marine Resources Commission, an agency of the Commonwealth of Virginia, United States.
The federal government of the United States empowers a wide range of federal law enforcement agencies to maintain law and public order related to matters affecting the country as a whole.
United States Department of Defense Police are the uniformed civilian police officers of the United States Department of Defense, various branches of the United States Armed Forces, or specific DoD activities.
In the United States, the state police is a police body unique to each U.S. state, having statewide authority to conduct law enforcement activities and criminal investigations. In general, state police officers or highway patrol officers, known as state troopers, perform functions that do not fall within the jurisdiction of a county’s sheriff, such as enforcing traffic laws on state highways and interstates, overseeing security of state capitol complexes, protecting governors, training new officers for local police forces too small to operate an academy and providing technological and scientific services. They also support local police and help to coordinate multi-jurisdictional task force activity in serious or complicated cases in states that grant full police powers statewide.
The Bureau of Indian Affairs Police, Office of Justice Services, also known as BIA Police, is the law enforcement arm of the United States Bureau of Indian Affairs. The BIA's official mission is to "uphold the constitutional sovereignty of the Federally recognized Tribes and preserve peace within Indian country". It provides police, investigative, corrections, technical assistance, and court services across the over 567 registered Indian tribes and reservations, especially those lacking their own police force; additionally, it oversees tribal police organizations. BIA services are provided through the Office of Justice Services Division of Law Enforcement.
The United States Department of the Air Force Police are the civilian uniformed police service of the United States Department of the Air Force, responsible for the force protection of assets and all aspects of law enforcement on U.S. Air Force and U.S. Space Force installations, and other facilities operated by Air Force and Space Force.
