Duane Edward Franklin Rupp (born March 29, 1938) is a Canadian retired ice hockey defenceman.

Rupp started his National Hockey League career with the New York Rangers.

He would also play with the Toronto Maple Leafs, Minnesota North Stars, and the Pittsburgh Penguins.

After playing the 1973–74 season with the Hershey Bears of the American Hockey League (AHL), Rupp played for two seasons with the Vancouver Blazers and Calgary Cowboys in the World Hockey Association before concluding his career in 1977 with the Rochester Americans of the AHL.

This biographical article relating to a Canadian ice hockey defenceman born in the 1930s is a stub.