|Full name||James Martinus Schoonmaker|
|Born||10 June 1933|
|Class(es)||Laser, Finn, Thistle, Flying Dutchman, Star, and Soling|
James Martinus "Ding" Schoonmaker (Born June 10, 1933 in Pittsburgh, Pennsylvania)  is an American sailor. He won the 1975 Star World Championships together with Jerry Ford . He has also several other podiums from the Star World Championships and Soling World Championships.