John A. Moffit (1865 – June 6, 1942) was an American labor unionist and government official.
He joined the National Hat Makers' Association of the United States, and became business agent of his local.
In 1896, the union became part of the new United Hatters of North America.
[1] In 1903, and again in 1912/13, Moffit served on the American Federation of Labor's Legislative Committee, and in this role, he helped draft the law which established the United States Department of Labor.
[1] In the mid-1920s, he became a lawyer in Washington D.C., but he remained a conciliator until his death, in 1942.