Donald Michel Marcotte (born April 15, 1947) is a Canadian former professional ice hockey player who served his entire National Hockey League career with the Boston Bruins and was noted as a premier defensive forward, while being versatile enough to play any forward position.

After three starring seasons for the Bears, Marcotte was recalled in the 1970 season just in time to be a defensive mainstay on Boston's checking line with Derek Sanderson and Ed Westfall for the Bruins' 1970 Stanley Cup Finals where they ended their 29 year drought to win the championship.

Marcotte was assigned to shadow superstar wingers like the Chicago Black Hawks' Bobby Hull (the "Golden Jet") and Montreal Canadiens' Guy Lafleur (the "Flower"); Lafleur in turn "considered Marcotte the toughest checker he ever faced" after the 1979 Stanley Cup playoffs.

He is a hard body checker who believes in playing the man before the puck, yet as the small number of minutes he spends in the penalty box indicate, he is not a dirty player".

Marcotte's 21 shorthanded goals in the regular season ranks him fourth in Bruins' history behind only Brad Marchand, Rick Middleton and Derek Sanderson.