David Patrick Hannan (born November 26, 1961) is a Canadian former professional hockey left winger who played 16 seasons in the National Hockey League with the Pittsburgh Penguins, Edmonton Oilers, Toronto Maple Leafs, Buffalo Sabres, Colorado Avalanche and Ottawa Senators.

Hannan's junior hockey career was divided between the Windsor Spitfires, Sault Ste.

His best statistical season in the NHL was 1985–86, in which he recorded 35 points in 75 games with the Pittsburgh Penguins.

On April 27, 1994, during the fourth overtime of a scoreless Game 6 of a playoff series at the Buffalo Memorial Auditorium, he backhanded a shot past New Jersey's Martin Brodeur to force Game 7 in New Jersey.

[1] Hannan's final NHL season was 1996–97, in which he played 34 games with the Ottawa Senators before retiring.