The 1986 1. divisjon was the 42nd completed season of top division football in Norway.

The season began on 27 April 1986 and ended on 19 October 1986.

22 games were played with 2 points given for wins and 1 for draws.

Lillestrøm SK won the league, after a slow start but later 11 consecutive wins.

Source: nifs.noNotes:2: Team played last season in 2. divisjon.