2018 Norwegian Second Division

The 2018 2. divisjon was a Norwegian football third-tier league season. The league consisted of 28 teams divided into 2 groups of 14 teams.
The league was played as a double round-robin tournament, where all teams played 26 matches.

Team changes

The following teams changed division since the 2017 season.

Promoted from 3. divisjon

Relegated from 1. divisjon

Promoted to 1. divisjon

Relegated to 3. divisjon

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, KFUM Oslo, then played against the 14th placed team in 1. divisjon for a place in the 2019 1. divisjon.
''KFUM Oslo won 4–1 on aggregate.''