Idrottsföreningen Kamraterna Norrköping, also known simply as IFK Norrköping, is a Swedish professional football club based in Norrköping. The club is affiliated to Östergötlands Fotbollförbund and play their home games at Nya Parken. The club colours, reflected in their crest and kit, are blue and white. Formed on 29 May 1897, the club have won twelve national championship titles and six national cup titles. The club are currently playing in Allsvenskan, where the season lasts from April to October. The club first won Allsvenskan in 1943. IFK Norrköping were most successful during the 1940s, when they won five Swedish championships and two Svenska Cupen titles under the Hungarian coach Lajos Czeizler and with the players like Gunnar Nordahl and Nils Liedholm.
IFK Norrköping dominated Swedish football in the post war era and won the first division 11 times in 20 glorious years culminating in the league triumph of 1963. It took the club another 26 years before adding championship title number 12 to the trophy cabinet.
The club had a fierce rivalry with the other local club, IK Sleipner, something that has been forgotten since Sleipner's fall from the higher divisions. The main rival today is mainly fellow Östergötland club Åtvidabergs FF.
IFK Norrköping also maintains departments for women's football, set up in 2009, orienteering, bowling and the in Sweden and a few other Nordic countries very popular sport of bandy. The bandy team played in Sweden's highest division in 1937.
Part of the club was also an ice hockey team which played in the seasons 1950/51 and 1955/56 in the highest Swedish division. The ice hockey teams of IFK and local rivals IK Sleipner were joined in 1967 to form IF IFK/IKS, known form 1973 forward as IK Vita Hästen ("Ice Hockey Club White Horse") which evolved into today's HC Vita Hästen.
^ abcdeIFK Norrköping have a cooperation with IF Sylvia and might temporarily loan out players to them during the season.
^The title of "Swedish Champions" has been awarded to the winner of four different competitions over the years. Between 1896 and 1925 the title was awarded to the winner of Svenska Mästerskapet, a stand-alone cup tournament. No club were given the title between 1926 and 1930 even though the first-tier league Allsvenskan was played. In 1931 the title was reinstated and awarded to the winner of Allsvenskan. Between 1982 and 1990 a play-off in cup format was held at the end of the league season to decide the champions. After the play-off format in 1991 and 1992 the title was decided by the winner of Mästerskapsserien, an additional league after the end of Allsvenskan. Since the 1993 season the title has once again been awarded to the winner of Allsvenskan.