The 2021 Superettan was part of the 2021 Swedish football season, and the 22nd season of Superettan, Sweden's second-tier football division in its current format. A total of 16 teams contested the league.
A total of 16 teams contested the league. The top two teams qualified directly for promotion to Allsvenskan, the third entered a play-off for the chance of promotion. The two bottom teams were automatically relegated, while the 13th and 14th placed teams competed in a play-off to determine whether they are relegated.
The 13th-placed and 14th-placed teams of Superettan met the two runners-up from 2021 Division 1 (Norra and Södra) in two-legged ties on a home-and-away basis with the teams from Superettan finishing at home.
Skövde AIK won 3–0 on aggregate and are promoted.
Dalkurd FF won 3–2 on aggregate and are promoted.
Copied content from 2020 Superettan; see that page's history for attribution
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