The 2012 1. divisjon (referred to as Adeccoligaen for sponsorship reasons) was a Norwegian second-tier football season. The season began on 9 April 2012 and ended on 11 November 2012. Two clubs, Start and Sarpsborg, were relegated from the 2011 Tippeligaen, while Notodden, Tromsdalen, Ull/Kisa, and Bærum were promoted from the 2011 2. divisjon. Asker, Nybergsund-Trysil, Randaberg and Løv-Ham were relegated to the 2012 2. divisjon At the end of the season, the two best teams were promoted to the 2013 Tippeligaen, while the four worst placed teams were relegated to the 2013 2. divisjon.