Lucien Grenier (born November 3, 1946 in Malartic, Quebec) is a retired professional ice hockey player who played 151 games in the National Hockey League. He played for the Montreal Canadiens and Los Angeles Kings. He won the Stanley Cup in 1969 with the Montreal Canadiens. Since, Grenier only played 2 playoff games, and did not dress in the regular season his name was left off even though he qualified to be on it.
Grenier turned pro with the Canadiens' farm team Houston Apollos in 1966-67. He earned callups with the Canadiens in 1968-69 and 1969-70.
In 1970 he was traded to the Los Angeles Kings in part for Wayne Thomas and Leon Rochefort. He played two full seasons for the Kings but missed 1972-73 due to an ankle injury suffered in training camp. Two part seasons with the Omaha Knights and he retired in 1975.