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

After playing his junior league hockey for the Niagara Falls Flyers in 1965, 1966 and 1967, Marcotte - whose rights were owned by the Bruins - turned pro in the 1968 season with the Hershey Bears of the American Hockey League. 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 championship.

Marcotte would play twelve more seasons in Boston, winning a second Stanley Cup in 1972. He become a noteworthy for his defense and penalty-killing—he led the NHL in shorthanded goals in 1971 with six—while scoring twenty or more goals seven times and thirty goals in 1975. Don Marcotte helped Boston to 3 more finals in 1974, 1977, 1978, but Boston did not win the cup. He was honored by being selected one of the NHL All-Stars for the 1979 Challenge Cup.

After being released in training camp by the Bruins in the fall of 1982, Marcotte retired from hockey. He had played in 868 games, scoring 230 goals and 254 assists for 484 points, and adding 317 penalty minutes.