1990 Norwegian Third Division

The 1990 3. divisjon, the third highest association football league for men in Norway. From 1991, the third tier was renamed as 2. divisjon.

22 games were played in 6 groups, with 3 points given for wins and 1 for draws. Drøbak/Frogn, Elverum, Haugar, Fana, Surnadal and Tromsdalen were promoted to the 2. divisjon. Number ten, eleven and twelve were relegated to the 4. divisjon.