Fredrikstad FK holds an enduring legacy as one of the foundational pillars and most decorated institutions in Norwegian football history. Founded on 7 April 1903 in the southeastern port city of Fredrikstad, the club was established by local sports enthusiasts seeking to popularize football as a primary summer discipline. The team traditionally competes in iconic red-and-white kits featuring white shirts with red sleeves and red shorts, a distinct aesthetic that earned the club its famous nickname Rødbuksene (The Red Shorts).
For over eight decades, the club's spiritual home was the historic Gamle Fredrikstad Stadion. In 2007, the team transitioned to the modern Fredrikstad Stadion, constructed on the grounds of the former Værste shipyard, beautifully integrating the city's maritime industrial heritage with its athletic culture. Domestically, Fredrikstad FK dominated the mid-20th century era of Norwegian football. The club boasts 9 Norwegian top-flight league championships (captured in 1938, 1939, 1949, 1951, 1952, 1954, 1957, 1960, and 1961) along with 11 Norwegian Football Cups (Norgesmesterskapet). Iconic figures who defined the club's legendary status include all-time forward Knut Brynhildsen, prolific goalscorer Per Kristoffersen (a multi-time league top scorer), midfielder Bjørn Borge, and modern cup-winning manager Dag-Eileva Fagermo.
In European competitions, Fredrikstad FK achieved one of the most famous triumphs in Nordic football history during the 1960–61 European Cup campaign. In the preliminary round, the Norwegian champions shocked continental football by eliminating Dutch powerhouses Ajax Amsterdam, securing a thrilling 4–3 victory at home followed by a courageous 0–0 draw in Amsterdam. This feat remains a defining moment in the club's international folklore. In subsequent decades, the club featured in the UEFA Cup Winners' Cup, UEFA Cup, and UEFA Europa League, engaging in memorable ties against sides like Lech Poznań.
Following a challenging period of financial distress and lower-league play, Fredrikstad FK successfully completed its revitalization, reclaiming its rightful place in the top-tier Eliteserien and restoring the pride of a nine-time national champion.