The 2009 2. divisjon season was the third highest football (soccer) league for men in Norway.
26 games were played in 4 groups, with 3 points given for wins and 1 for draws. Strømmen, Follo, Sandnes Ulf and Ranheim were promoted to the 2010 Norwegian First Division. Number twelve, thirteen and fourteen were relegated to the 3. divisjon, except for the two number twelve teams with the most points. The winning teams from each of the 24 groups in the 3. divisjon each faced a winning team from another group in a playoff match, resulting in 12 playoff winners which were promoted to the 2. divisjon.