| Competition: | Superettan |
| Season: | 2020 |
| Winners: | Halmstads BK |
| Promoted: | Halmstads BK Degerfors IF |
| Relegated: | Dalkurd FF Umeå FC Ljungskile SK |
| League Topscorer: | Pontus Engblom (20 goals) |
| Biggest Home Win: | Norrby IF 6–0 Umeå FC (21 November 2020) |
| Biggest Away Win: | Umeå FC 0–6 Degerfors IF (21 September 2020) GIF Sundsvall 0–6 Halmstads BK (21 November 2020) |
| Highest Scoring: | GIF Sundsvall 5–2 Ljungskile SK (7 August 2020) Degerfors IF 2–5 GIF Sundsvall (28 November 2020) |
| Longest Wins: | 9 matches Halmstads BK[1] |
| Longest Unbeaten: | 11 matches Degerfors IF Akropolis IF |
| Longest Winless: | 10 matches GAIS |
| Longest Losses: | 5 matches GIF Sundsvall Örgryte IS |
| Prevseason: | 2019 |
| Nextseason: | 2021 |
The 2020 Superettan was part of the 2020 Swedish football season, and the 21st season of Superettan, Sweden's second-tier football division in its current format. A total of 16 teams contest the league.
A total of 16 teams contest the league. The top two teams qualify directly for promotion to Allsvenskan, the third will enter a play-off for the chance of promotion. The two bottom teams are automatically relegated, while the 13th and 14th placed teams will compete in a play-off to determine whether they are relegated.
| Team | Location | Stadium | Stadium capacity | |
|---|---|---|---|---|
| AFC Eskilstuna | Eskilstuna | Tunavallen | 7,800 | |
| Akropolis IF | Spånga | Grimsta IP | 5,000 | |
| Dalkurd FF | Uppsala | Nya Studenternas | 10,000 | |
| Degerfors IF | Degerfors | Stora Valla | 12,500 | |
| GAIS | Gothenburg | Gamla Ullevi | 18,416[2] | |
| GIF Sundsvall | Sundsvall | Idrottsparken | 7,700 | |
| Halmstads BK | Halmstad | Örjans Vall | 10,873 | |
| IK Brage | Borlänge | Domnarvsvallen | 6,500 | |
| Jönköpings Södra IF | Jönköping | Stadsparksvallen | 5,500 | |
| Ljungskile SK | Ljungskile | Skarsjövallen | 8,000 | |
| Norrby IF | Borås | Borås Arena | 17,800 | |
| Trelleborgs FF | Trelleborg | Vångavallen | 7,000[3] | |
| Umeå FC | Umeå | Gammliavallen | 10,000 | |
| Västerås SK | Västerås | Iver Arena | 7,000 | |
| Örgryte IS | Gothenburg | Gamla Ullevi | 18,416 | |
| Östers IF | Växjö | Visma Arena | 12,000 |
The 13th-placed and 14th-placed teams of Superettan met the two runners-up from 2020 Division 1 (Norra and Södra) in two-legged ties on a home-and-away basis with the teams from Superettan finishing at home.----Landskrona BoIS won 3–1 on aggregate.----
2–2 on aggregate. Trelleborgs FF won 4–1 on penalties.----
| Player | For ! | Against | Result | Date | |
|---|---|---|---|---|---|
 Rasmus Wiedesheim-Paul | Halmstads BK | Jönköpings Södra IF | 3–0 | 27 June 2020 | |
| Anton Lundin | IK Brage | Ljungskile SK | 1–3 | 8 July 2020 | |
 Fatawu Safiu | Trelleborgs FF | Dalkurd FF | 4–1 | 25 July 2020 | |
| Johan Bertilsson | Degerfors IF | Östers IF | 3–1 | 29 July 2020 | |
| Robin Strömberg | Norrby IF | Västerås SK | 3–1 | 13 September 2020 | |
| Rasmus Wiedesheim-Paul | Halmstads BK | Umeå FC | 4–0 | 16 September 2020 | |
| Johan Bertilsson | Degerfors IF | Umeå FC | 0–6 | 21 September 2020 | |
| Bubacarr Jobe | Örgryte IS | Östers IF | 4–1 | 24 October 2020 |
Enis Ahmetovic (Umeå) Filip Almström Tähti (Västerås) Oscar Lundin (Brage) Linus Dahl (Ljungskile)