The U.S. Department of Justice (DOJ) is responsible for enforcing all laws and defending all interests of the United States.

U.S. Attorneys are representatives of the DOJ who prosecute offenders and represent the U.S. government in court.

The National Security Division coordinates the DOJ's highest priority of combating terrorism and protecting national security.

The major investigative agencies under the DOJ include the FBI (Federal Bureau of Investigation), DEA (Drug Enforcement Administration), and the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF). These agencies work to prevent and deter crime, as well as arrest criminal suspects.

The U.S. Marshals Service serves to protect the federal judiciary, apprehend fugitives, and detain individuals in federal custody.

The Federal Bureau of Prisons is responsible for confining convicted offenders.

The litigating divisions within the DOJ enforce federal criminal and civil laws, including statutes related to civil rights, tax, antitrust, environmental issues, and civil justice.