| Jan Frederiksen | |
| Fullname: | Jan Frederiksen |
| Birth Date: | 20 June 1982 |
| Birth Place: | Copenhagen, Denmark |
| Position: | Left-back |
| Years1: | 2001 |
| Clubs1: | Lyngby |
| Caps1: | 8 |
| Goals1: | 0 |
| Years2: | 2002 |
| Clubs2: | Feyenoord |
| Caps2: | 0 |
| Goals2: | 0 |
| Years3: | 2002 |
| Clubs3: | → Excelsior (loan) |
| Caps3: | 3 |
| Goals3: | 0 |
| Years4: | 2003–2005 |
| Clubs4: | Midtjylland |
| Caps4: | 12 |
| Goals4: | 0 |
| Years5: | 2004–2005 |
| Clubs5: | → Herfølge (loan) |
| Caps5: | 26 |
| Goals5: | 0 |
| Years6: | 2005–2006 |
| Clubs6: | Herfølge |
| Caps6: | 45 |
| Goals6: | 1 |
| Years7: | 2007–2009 |
| Clubs7: | Randers |
| Caps7: | 73 |
| Goals7: | 1 |
| Years8: | 2009–2012 |
| Clubs8: | Brøndby |
| Caps8: | 47 |
| Goals8: | 1 |
| Years9: | 2012–2013 |
| Clubs9: | Wisła Kraków |
| Caps9: | 11 |
| Goals9: | 0 |
| Years10: | 2013 |
| Caps10: | 11 |
| Goals10: | 0 |
| Years11: | 2013–2014 |
| Clubs11: | AB |
| Caps11: | 12 |
| Goals11: | 0 |
| Years12: | 2016–2018 |
| Clubs12: | FC Græsrødderne |
| Totalcaps: | 248 |
| Totalgoals: | 3 --> |
| Nationalyears1: | 2001 |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2002 |
| Nationalcaps2: | 6 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 2002–2003 |
| Nationalcaps3: | 2 |
| Nationalgoals3: | 0 |
Jan Frederiksen (born 20 June 1982) is a Danish former professional footballer who played as a left-back.
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 the 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.[1] On 8 August 2012, Frederiksen moved to Polish Ekstraklasa side Wisła Kraków.
Ahead of the 2013 MLS season, Frederiksen was on trial with American soccer club, D.C. United, but he was eventually cut by the team.[2]
Frederiksen represented the country at youth level, playing for the Denmark under-19, under-20 and under-21 national teams.