2006 3. Divisjon

The 2006 season of the 3. Divisjon, the fourth-highest association football league for men in Norway.

Between 20 and 22 games (depending on group size) were played in 24 groups, with 3 points given for wins and 1 for draws. Twelve teams were promoted to the 2. Divisjon through playoff.

There was a redesigning of the 3. Divisjon to better fit geographical boundaries next season. Fewer teams than usual were relegated; purposely none from the Oslo district and none from Agder.