Augustine Michael Duffy (February 18, 1905 – July 26, 1966) was a businessman and politician in Newfoundland, Canada.
The son of Michael A. Duffy and Mary J. Lawlor, he was born in St. John's in 1905 and was educated at Saint Bonaventure's College.
Duffy married his first wife, Ethel Oliphant, around 1930; the couple had two daughters, Geraldine Mary (b.1932) and Joan Bernadette (b.1933).
He was managing director of A.M. Duffy Ltd. and of The Colonial Stationery Ltd.[1] He was first elected to the Newfoundland assembly in 1951 as a Progressive Conservative.
The results of the election were overturned due to voting irregularities and Duffy was defeated in the by-election that followed.