There have been four interim presidents at Winthrop during its history.
– Mowat G. Fraser: Dr. Fraser was interim president (1943-1944) between the terms of Shelton J. Phelps and Henry Radcliffe Sims.
– Glenn G. Thomas: Dr. Thomas was interim president (1982-1983) between the terms of Charles Brooks Vail and Phillip Lader.
– W. Marcus Newberry: Dr. Newberry was interim president (1985-1986) between the terms of Phillip Lader and Martha Kime Piper.
– Michael Smith: Dr. Smith was interim president (1988-1989) between the terms of Martha Kime Piper and Anthony Joseph DiGiorgio.