The 1986 2. divisjon was a Norway's second-tier football league season.
The league was contested by 24 teams, divided into two groups; A and B.
The bottom three teams inn both groups were relegated to the 3. divisjon.
The second-placed teams, Drøbak/Frogn and Vidar met Tromsø in the promotion play-offs.
Tromsø won the qualification round and remained in the 1. divisjon.