The Østfold Workers' Sports Association (Norwegian: Østfold Arbeideridrettskrets, often abbreviated to Østfold AIK), founded 23 October 1927, was a sporting association from Østfold in Norway.
It was one of many regional associations within the Workers Federation of Sports (AIF).
Within the Østfold AIK there were many clubs:[1][2] In football, Østfold AIK was the leading club within the AIF.
Two Østfold teams, Sprint and Sparta, won 9 of the 16 AIF national football championships held between 1924 and 1939.
[10] Østfold AIK occasionally selected a combined football team to play international matches, such as 27 August 1937 when they played the Basque Country.