Jan Kristiansen (born 4 August 1981) is a Danish former professional footballer who played as a midfielder.

On 12 February 2003, he debuted for the senior Danish national team, coming on as a substitute in a 4–1 win against Egypt, and Kristiansen ended the 2002–03 season as joint Superliga top scorer, he and Søren Frederiksen both scoring 18 goals.

On 12 January 2006, it was announced that Kristiansen would leave Esbjerg fB with immediate effect and move abroad to 1.

[1] In the 2006–07 seasons, he won the DFB-Pokal with the Franconians, scoring the winning goal in extra time, as Nürnberg beat VfB Stuttgart 3–2.

In July 2008, he returned to his homeland when he signed a five-year contract with Brøndby IF.