Royce Herbert Frith, CM QC (November 12, 1923 – March 17, 2005) was a Canadian diplomat, public servant and politician. He received a BA from the University of Toronto, an LL.B from Osgoode Hall Law School and a Dipl. d’études supérieures (droit) from the University of Ottawa. He was admitted to the Ontario Bar in 1949. An amateur actor and performer, Frith found time to act in plays, perform on the radio, and sing and play several instruments.