John Dacher McWilliams (July 23, 1891 – March 30, 1975) was a U.S. Representative from Connecticut.
During the First World War, he served as a private in the Twentieth Engineers, United States Army, with overseas service, from March 26, 1918, until discharged on July 1, 1919.
He was employed at the electric boat division of General Dynamics Corporation, Groton, Connecticut, from 1950 to 1960.
He was employed by the city of Norwich, where he resided until his death thereon March 30, 1975.
This article incorporates public domain material from the Biographical Directory of the United States Congress