| Competition: | First League of the Federation of Bosnia and Herzegovina |
| Season: | 2020–21 |
| Dates: | 8 August 2020 – 5 June 2021 |
| Winners: | Posušje |
| Promoted: | Posušje |
| Relegated: | Čapljina Slaven |
| Matches: | 240 |
| Total Goals: | 604 |
| League Topscorer: | Dženan Haračić (18 goals) |
| Biggest Home Win: | Posušje 7–0 Budućnost (14 November 2020) |
| Biggest Away Win: | Slaven 0–7 Bratstvo (24 April 2021) |
| Highest Scoring: | Slaven 0–7 Bratstvo (24 April 2021) Posušje 7–0 Budućnost (14 November 2020) GOŠK 6–1 Travnik (22 May 2021) GOŠK 6–1 Slaven (16 May 2021) Slaven 4–3 Orašje (5 September 2020) |
| Longest Wins: | TOŠK Goražde Bratstvo (5 matches) |
| Longest Unbeaten: | Posušje (11 matches) |
| Longest Winless: | Slaven (25 matches) |
| Longest Losses: | Slaven (14 matches) |
| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 First League of the Federation of Bosnia and Herzegovina (known as the m:tel First League for sponsorship reasons) was the 21st season of the First League of the Federation of Bosnia and Herzegovina, the second tier football league of Bosnia and Herzegovina. The season began on 8 August 2020 and ended on 5 June 2021.
Posušje were crowned champions, winning their first championship title and earning promotion to the Premier League of Bosnia and Herzegovina.[1]
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| Bratstvo | Gračanica | Gradski Stadion Luke, Gračanica | 3,000 | |
| Budućnost | Banovići | Stadion FK Budućnost | 8,500 | |
| Čapljina | Čapljina | Bjelave Stadium | 3,000 | |
| Goražde | Goražde | Midhat Drljević Stadium | 1,500 | |
| GOŠK | Gabela | Perica-Pero Pavlović Stadium | 3,000 | |
| Igman | Konjic | Gradski Stadion, Konjic | 5,000 | |
| Jedinstvo | Bihać | Pod Borićima Stadium | 7,500 | |
| Orašje | Orašje | Gradski Stadion, Orašje | 3,000 | |
| Posušje | Posušje | Mokri Dolac Stadium | 8,000 | |
| Radnik | Hadžići | Gradski Stadion, Hadžići | 500 | |
| Rudar | Kakanj | FK Rudar Stadium | Gradski Stadion, Kakanj---> | 4,568 |
| Slaven | Živinice | Gradski Stadion, Živinice | 500 | |
| TOŠK | Tešanj | Luke Stadium, Tešanj | 7,000 | |
| Travnik | Travnik | Pirota Stadium | 4,000 | |
| Vis Simm-Bau | Kosova, Maglaj | Grabovac Stadium | 1,200 | |
| Zvijezda | Gradačac | Banja Ilidža | 5,000 |
| 1 | align=left |  Dženan Haračić | align=left | GOŠK | 18 |
| 2 | align=left | Selmir Mahmutović | align=left | Vis Simm-Bau | 15 |
| 3 | align=left | Maid Jaganjac | align=left | Bratstvo | 13 |
| 4 | align=left | Dino Dizdarević | align=left | Vis Simm-Bau | 12 |
| align=left | Sedin Ljuca | align=left | Čapljina |