The United Federal Workers of America (UFWA) was an American labor union representing federal government employees which existed from 1937 to 1946. It was the first union with this jurisdiction established by the Congress of Industrial Organizations (a national labor federation). In 1946 it merged with other unions to form the influential United Public Workers of America. The union challenged the constitutionality of the Hatch Act of 1939, which led to the Supreme Court decision in United Public Workers v. Mitchell, 330 U.S. 75 (1947).