Kenneth Scott Hannan (born January 23, 1979 in Richmond, British Columbia) is a Canadian professional ice hockey defenceman who currently plays for the Colorado Avalanche of the National Hockey League.
Hannan was selected in the first round of the 1997 NHL Entry Draft, 23rd overall, by the San Jose Sharks from the Kelowna Rockets of the WHL. Hannan made his professional debut at the start of the 1998–99 season with the Sharks, playing in five games before returning to the Rockets for his last year of juniors. Hannan then split the 1999–00 season, his first full professional season, with the Sharks and AHL affiliate Kentucky Thoroughblades.
Hannan became a mainstay on the Sharks blueline from the 2000–01 season and evolved as an effective, gritty shut down defensman, earning selection as an NHL All-Star for the Western Conference in the 2003–2004 Season. Hannan emerged as a premier defensman during the 2003–04 playoffs gaining praise for his performance in shutting down star center Peter Forsberg in the conference semi-finals win against Colorado. Hannan played his 500th NHL game at the end of the 2006–07 season in a 4-3 loss to the Colorado Avalanche on March 18, 2007.