Joseph George Leopold Marcel Fillion - Born May 28, 1922 — May 15, 1998) was a Canadian professional ice Hockey left winger.

Left-winger Marcel Fillion played one game for the Boston Bruins in 1944-45. Other than his big league cameo, he was a prolific goal scorer in junior, senior and the minor leagues.

The native of Thetford Mines, Quebec, starred for the Shawinigan Cataracts and Quebec Sea Gulls over the period 1940-43. After not taking part in the 1943-44 season, Fillion scored 78 points in 46 games for the Boston Olympics of the Eastern League. He dressed once for Boston but otherwise was a stalwart in the Eastern and Quebec senior leagues.

Fillion was an integral component of the Boston Olympics' EHL championships in 1945 and 1947. He later played two years for the Sherbrooke Saints of the QSHL then retired in 1951. After sitting out one season he returned to play two years with the senior Rimouski Renards before hanging up his skates for good.

Fillion is a member of Thetford Mines' and one of Quebec's most famous Hockey family, being one of seven Hockey playing siblings. Left winger Marcel reached the National Hockey League, playing one game for the Boston Bruins in 1944–1945 and playing in the Eastern Hockey League, the American Hockey League and the Quebec Senior Hockey League from 1944 to 1952. Right winger Dennis played in the United States Hockey League, the Pacific Coast Hockey League, the American Hockey League, the Maritime Major Hockey League, the Quebec Senior Hockey League and the Atlantic Coast Senior League from 1948 to 1956. Defenceman Georges was invited to the Montreal Canadiens training camp at the same time as Bob but decided to return home to Thetford Mines because he did not speak English very well. He played in the Quebec Senior Hockey League. Nelson, Fernand and Jean-Marie Fillion also played in the Quebec Senior Hockey League and various Senior Hockey leagues throughout the years. All seven Fillion brothers played on the same team, the Thetford Chappies of the Ligue Intermédiaire de Hockey du Québec during the 1940s.

The Fillions were indeed a Hockey family.