The 2008 1. divisjon season (referred to as Adeccoligaen for sponsorship reasons) began on 5 April 2008 and ended on 1 November 2008.
Automatic promotion was awarded to the teams finishing in the top three places in the standings.
At the conclusion of the season, all three had managed to secure promotion, with Odd Grenland being confirmed as champions of the 1. divisjon after defeating Start 3–2 in the penultimate round.
[3] Sandnes Ulf and Hødd were relegated to the 2. divisjon after finishing in fifteenth and sixteenth place respectively.
Nybergsund, who had never previously played at the second level, retained their spot, finishing in eighth place.