| Competition: | 2. divisjon |
| Season: | 1979 |
| Winners: | Fredrikstad Lyn |
| Promoted: | Fredrikstad Lyn Molde |
| Relegated: | Vigør Vigrestad Fram Larvik Stjørdals-Blink Tromsø Aalesund |
| Prevseason: | 1978 |
| Nextseason: | 1980 |
The 1979 2. divisjon was a Norwegian second-tier football league season.
The league was contested by 24 teams, divided into two groups; A and B.[1] Both groups consisted of 12 teams. The winners of group A and B were promoted to the 1980 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.
Fredrikstad won group A with 34 points. Lyn won group B with 38 points. Both teams promoted to the 1980 1. divisjon. The second-placed teams, Pors and Molde met in the promotion play-offs. Molde defeated Pors with 7–0 on aggregate and won promotion.
Molde won 7–0 on aggregate. Molde was promoted to 1. divisjon.