Lillestrom FK is a Norwegian football club from the town of Lillestrom in Hedmark county. The club was founded on 16 May 1918 and played in the Norwegian top division from 1922 to 2007. In 2008, Lillestrom was relegated to the First Division, but was promoted back to the Norwegian Premier League in 2010. The club played their last season in the Norwegian Premier League in 2016.
Lillestrom has never won a Norwegian Premier League title, but has won the Norwegian Cup four times, in 1992, 2000, 2007, and 2013. The club has also played in the UEFA Champions League, playing in the first qualifying round in 2011 and the play-off round in 2013.