2011 Norwegian First Division

The 2011 1. divisjon (referred to as Adeccoligaen for sponsorship reasons) was a Norwegian second-tier football season. The season began play on 3 April 2011 and ended on 30 October 2011. The clubs relegated from the 2010 Tippeligaen were Hønefoss (after relegation play-offs), Kongsvinger and Sandefjord. Asker, HamKam, Hødd, and Randaberg were promoted from the 2010 2. divisjon. At the end of the season, the two best teams were promoted to the 2012 Tippeligaen, while the four bottom placed teams were relegated to the 2012 2. divisjon. There was not a two-legged promotion play-off this season.

2011 Norwegian First Division

The 2011 1. divisjon (referred to as Adeccoligaen for sponsorship reasons) was a Norwegian second-tier football season. The season began play on 3 April 2011 and ended on 30 October 2011. The clubs relegated from the 2010 Tippeligaen were Hønefoss (after relegation play-offs), Kongsvinger and Sandefjord. Asker, HamKam, Hødd, and Randaberg were promoted from the 2010 2. divisjon. At the end of the season, the two best teams were promoted to the 2012 Tippeligaen, while the four bottom placed teams were relegated to the 2012 2. divisjon. There was not a two-legged promotion play-off this season.