The club competed in 2015 Allsvenskan, 2014–15 Svenska Cupen (starting with group stage after qualification previous season) and 2015–16 Svenska Cupen (qualification for next season group stage).

The season began with 2014–15 Svenska Cupen group stage on 22 February, with 2015 Allsvenskan starting on 4 April.

The league ended with the last match on 31 October 2015, in which they became league champions, and the last match of the season was 2015 Svenska Supercupen on 8 November where IFK Norrköping, as champions, met 2014–15 Svenska Cupen winners, IFK Göteborg.

On 4 October 2015, with three matches remaining in 2015 Allsvenskan, IFK Norrköping secured a top 3 finish and a spot in European competitions for the next season.

All of the winners in the group stage were teams that would be participating in 2015 Allsvenskan, so IFK Norrköping was drawn against BK Häcken in a draw with many tough opponents (especially since being unseeded).

BK Häcken had the advantage of playing at home since they were the seeded team and, despite scoring the first goal, IFK Norrköping was not able to defeat BK Häcken away from home and lost with the final score 3–1.

They were seeded in the draw together with all the other teams from Allsvenskan and Superettan, and they were drawn against Akropolis IF from Division 1 (fourth tier).

The 2015 Svenska Supercupen was played between 2015 Allsvenskan champions, IFK Norrköping, and 2014–15 Svenska Cupen winners, IFK Göteborg (runners-up in Allsvenskan), at Nya Parken, Norrköping on 8 November 2015.