Sherman Monahan was born on 15 February 1929 in Germantown, South Dakota, USA. He was an actor, known for Power Slide (1990) and O Pioneers! (1992). He died on 31 March 2013 in Watertown, South Dakota, USA.
Sherman worked for a time for photographer Bert Kopperl. Sherman's contribution to Kopperl's work is featured in the book on Kopperl called With Two Wheels and a Camera. (Exposition Press 1979).