1980 2. divisjon

The 1980 2. divisjon was a Norwegian second-tier football league season. The league was contested by 24 teams, divided into two groups; A and B. Both groups consisted of 12 teams. The winners of group A and B were promoted to the 1981 1. divisjon. The second placed teams in group A and B met each other in a two-legged qualification round where the winner was promoted to 1. divisjon. The bottom three teams in both groups were relegated to the 3. divisjon.

1980 2. divisjon

The 1980 2. divisjon was a Norwegian second-tier football league season. The league was contested by 24 teams, divided into two groups; A and B. Both groups consisted of 12 teams. The winners of group A and B were promoted to the 1981 1. divisjon. The second placed teams in group A and B met each other in a two-legged qualification round where the winner was promoted to 1. divisjon. The bottom three teams in both groups were relegated to the 3. divisjon.