| Competition: | 2. divisjon |
| Season: | 1988 |
| Winners: | Viking Mjølner |
| Promoted: | Viking Start Mjølner |
| Relegated: | Kvik Halden Haugar Odd Alvdal Skarp Sunndal |
| Prevseason: | 1987 |
| Nextseason: | 1989 |
The 1988 2. divisjon was a Norwegian second-tier football league season.
The league was contested by 24 teams, divided into two groups; A and B. The winners of group A and B were promoted to the 1989 1. divisjon.[1] The second placed teams met the 10th position finisher in the 1. divisjon in a qualification round where the winner was promoted to 1. divisjon. The bottom three teams in both groups were relegated to the 3. divisjon.
Viking won group A with 45 points and Mjølner won group B with 53 points. Both teams promoted to the 1989 1. divisjon. The second-placed teams, Start and HamKam met Bryne in the promotion play-offs. Start won the qualification and was promoted to the 1. divisjon.
Start won the qualification round and won promotion to the 1. divisjon.