2020 Norwegian Second Division

The 2020 2. divisjon (referred to as PostNord-ligaen for sponsorship reasons) was a Norwegian football third-tier league season. The league consisted of 28 teams divided into 2 groups of 14 teams. The groups were announced by the NFF on 7 December 2019.

Under normal circumstances, the league would have been played as a double round-robin tournament, where all teams play 26 matches. However, this season, due to the COVID-19 pandemic, the league was split after 13 rounds, meaning the teams only played each other once in this stage. The seven best ranked teams in each of the two groups qualified for a second stage, the promotion groups, where they were to play six more matches. The seven worst ranked teams in each of the two groups did not play any more matches after the first stage, and no teams were relegated.

On 12 November, four of the last six matches in group 1 were cancelled because the teams had nothing left to play for. The two teams finishing in first and second place had already been determined. One match was also cancelled in group 2 for the same reason.

Team changes
The following teams changed division since the 2019 season.

To 2. divisjon
Promoted from 3. divisjon
 * Eidsvold Turn
 * Vålerenga 2
 * Fløy-Flekkerøy
 * Vard Haugesund
 * Rosenborg 2
 * Fløya

Relegated from 1. divisjon
 * Notodden
 * Skeid
 * Tromsdalen

From 2. divisjon
Promoted to 1. divisjon
 * Stjørdals-Blink
 * Grorud
 * Åsane

Relegated to 3. divisjon
 * Vidar
 * Sola
 * Byåsen
 * Elverum
 * Oppsal
 * Mjølner

Promotion play-offs
The teams who finished in second place in their respective group qualified for the promotion play-offs, where they faced each other over two legs. The winner, Asker then played against the 14th placed team in the 1. divisjon for a place in the 2021 1. divisjon.

''2–2 on aggregate. Asker won 4–3 on penalties.''