| Position: | Centre |
| Shoots: | Left |
| Played For: | Lethbridge Maple Leafs Stratford Kroehlers Stratford Indians |
| Ntl Team: | CAN |
| Birth Date: | 22 July 1930 |
| Birth Place: | Kitchener, Ontario, Canada |
| Death Place: | Stratford, Ontario, Canada |
| Career Start: | 1946 |
| Career End: | 1958 |
Denis William Flanagan (July 22, 1930 – November 25, 2018) was a Canadian ice hockey player with the Lethbridge Maple Leafs. He won a gold medal at the 1951 World Ice Hockey Championships in Paris, France. The 1951 Lethbridge Maple Leafs team was inducted to the Alberta Sports Hall of Fame in 1974.[1] He also played with the Stratford Kroehlers and Stratford Indians.[2]