The Fraternal Order of Police Auxiliary is an ancillary organization of law enforcement officers.  The Auxiliary is the only national support organization of its kind.

The Fraternal Order of Police Auxiliary was organized to unite families of members of the Fraternal Order of Police; to promote their welfare socially, morally and intellectually; and to encourage them in all things pertaining to their good.

In 1920, a group of wives of Pittsburgh, PA police officers gathered to discuss issues concerning their husbands and their jobs.  This was the birth of the first "FOP Ladies Auxiliary."  In 1941, Kathryn Milton because the first national president of the Ladies Auxiliary.  Since that time, the Auxiliary has grown to over 2,000 members in 140 subordinate Auxiliaries representing 25 states.

In 1985, membership eligibility that originally allowed only females as members was extended to family members (18 years of age or older) of any member of the Fraternal Order of Police.  In 1987, the name of the organization was changed, dropping the word "Ladies" to reflect the growth in membership of the organization.