The men's football team currently plays in the Norwegian second division.

The club was formed as Østsiden IL on 14 June 1935, and includes football and handball branches.

[1] The name "Østsiden Idrettslag Fredrikstad" was introduced after a merge between Østsiden IL and the handball club Fredrikstad HK on 29 November 2007.

[2] Notable former players on Østsiden IL's male football team include Jørn Andersen and Egil Olsen.

[3] The team reached the quarter finals in the Norwegian Football Cup in 1962, after beating FC Lyn in the fourth round.