København A-Raeken 1889/90

The second oldest league competition in the world was contested in Denmark in the 1889/90 season. The competition was contested exclusively by Copenhagen clubs, with national championship playoffs being introduced in 1911/12. Seven teams entered, and all the matches were played at Nørrefælled park. All matches were played to a positive result, with extra time and replays if necessary.

The championship was won by Akademisk Boldklub (AB), a club formed in 1889 for University students, and the dominant force in early Danish football . They won the title via a rather protracted series of play offs. On March 30th 1890 they faced the other previously unbeaten team, Kjøbenhavns Boldklub (KB). AB emerged 2-1 winners. Due to this match being played in very bad weather conditions, a replay was arranged, which KB won 3-0. Each side having now won one game it was decided that they should play for a third time, and AB again won 2-1.