Mark Rudolph MacGuigan, PC (February 17, 1931 – January 12, 1998) was a Canadian academic and politician. Born in Charlottetown, Prince Edward Island, the son of Mark Rudolph MacGuigan and Agnes Violet Trainor, he was educated at Saint Dunstan's University (B.A.), the University of Toronto (M.A., Ph.D. (Philosophy)), Osgoode Hall Law School (LL.B.), and Columbia University (LL.M., J.S.D.) He was a professor at Osgoode and the University of Toronto and was dean of law at the University of Windsor. He died in Oklahoma City of liver cancer in 1998.