Robert C. Duffy (May 13, 1903 – December 9, 1974) was an American football coach and lawyer.
He was the 20th head football coach at Dickinson College in Carlisle, Pennsylvania, serving for two seasons, from 1927 to 1928, and compiling a record of 6–9–1.
[1] After serving in World War II, he practiced law in Philadelphia and was elected Register of Wills as a Republican in 1953.
During World War II, Duffy was assigned to the T13th Transport Squadron, nicknamed "The Thirsty 13th," from September 1942 until January 1945, first as the Intelligence Officer, and then the Executive Officer—right-hand man of the Commanding Officer, in New Caledonia, New Hebrides, and Biak.
He did not run for re-election as Register of Wills in 1957, but continued his private law practice.