Kjetil Byfuglien (born 23 May 1977 in Oslo) is a retired Norwegian football defender.
Byfuglien played for Haga IF, NTG and Stabæk IF before joining Asker SK.
While with Asker, he had a trial with English side Torquay United in November 2001 and was set for a trial with Queens Park Rangers later the same month.He joined Kongsvinger IL in 2002 and played mostly left wing, but later during his stay he appeared more often at left-back.
In October 2006 he left to join Hønefoss BK.
In 2010, he made his debut for Hønefoss in the Norwegian Premier League.