| Season | 2020 |
|---|---|
| Dates | 3 July – 13 December |
| Champions | Tromsø |
| Promoted | Tromsø Lillestrøm |
| Relegated | Kongsvinger Øygarden |
| Matches played | 240 |
| Goals scored | 781 (3.25 per match) |
| Top goalscorer | Henrik Udahl (19 goals) |
| Biggest home win | KFUM Oslo 6–0 Øygarden (7 December 2020) |
| Biggest away win | Ull/Kisa 0–7 Tromsø (29 September 2020) |
| Highest scoring | Stjørdals-Blink 5–4 Sandnes Ulf (14 September 2020) Tromsø 5–4 Åsane (3 October 2020) Raufoss 5–4 KFUM Oslo (13 December 2020) |
| Longest winning run | 8 games Tromsø[1] |
| Longest unbeaten run | 14 games Lillestrøm[1] |
| Longest winless run | 10 games HamKam[1] |
| Longest losing run | 6 games Kongsvinger[1] |
← 2019 2021 → | |
The 2020 1. divisjon (referred to as OBOS-ligaen for sponsorship reasons) was a Norwegian second-tier football league season.