The 1990 1. divisjon season, the highest women's football (soccer) league in Norway, began on 28 April 1990 and ended on 6 October 1990.

18 games were played with 3 points given for wins and 1 for draws.

Number nine and ten were relegated, while two teams from the 2. divisjon were promoted through a playoff round.

Sprint/Jeløy won the league, losing only one game.