The Fraternal Order of Police (FOP) is an organization of sworn law enforcement officers in the United States. It has a membership of over 325,000 members organized in 2100 local chapters (lodges), organized into local lodges, state lodges, and the national Grand Lodge. The FOP is "the voice of our nation's law enforcement officers."

The FOP has some characteristics of a trade union, although it is not described as such and labels itself a "full service member representation organization." It lobbies Congress and regulatory agencies on behalf of law enforcement officers, provides labor representation, promotes legal defense for officers, and offers charities such as Easter Seals, Special Olympics, memorials for fallen officers, and support programs for spouses and family members of police officers, and other local Youth Organizations and Civic Organizations.