|Full name||Jan Frederiksen|
|Date of birth||20 June 1982|
|Place of birth||Copenhagen, Denmark|
|Height||1.81 m (5 ft 11 in)|
|Playing position||Left back|
|2002||→ Excelsior (loan)||3||(0)|
|2004–2005||→ Herfølge (loan)||26||(0)|
|* Senior club appearances and goals counted for the domestic league only.
Frederiksen began his career at Lyngby Boldklub, where he made his Superliga debut during the 2000–01 season. In 2002, he moved to Feyenoord, but subsequently was loaned out to its satellite club Excelsior. After one year in Netherlands Frederiksen returned to Denmark and signed with FC Midtjylland. Then he played for Herfølge Boldklub, before moving to Randers FC. On 16 January 2009, he signed a three-year contract with Brøndby IF, and joined the club on a free transfer on 1 July. On 8 August 2012, Frederiksen moved to Polish Ekstraklasa side Wisła Kraków.
- FC Græsrødderne‚ fodboldlegender.dk
- Jan Frederiksen skifter til Brøndby IF
- Goff, Steven (19 February 2013). "D.C. United is beneficiary of Chivas USA's attempt to remake roster". The Washington Post. WashingtonPost.com. Retrieved February 20, 2013.