| Competition: | Belarusian First League |
| Season: | 2005 |
| Winners: | Belshina Bobruisk |
| Promoted: | Belshina Bobruisk Lokomotiv Vitebsk |
| Relegated: | Torpedo-Kadino Mogilev Orsha Dnepr-DUSSh-1 Rogachev |
| Matches: | 240 |
| Total Goals: | 636 |
| Prevseason: | 2004 |
| Nextseason: | 2006 |
2005 Belarusian First League was the 15th season of 2nd level football championship in Belarus. It started in April and ended in November 2005.
Two top teams of the last season (Lokomotiv Minsk and Vedrich-97 Rechitsa) were promoted to Belarusian Premier League. They were replaced by two teams that finished at the bottom of 2004 Belarusian Premier League table (Lokomotiv Vitebsk and Belshina Bobruisk).
Two teams that finished at the bottom of 2004 season table (Vertikal Kalinkovichi and Dinamo-Juni Minsk) relegated to the Second League. They were replaced by two best teams of 2004 Second League (Smena Minsk and Orsha).
Vedrich-97 Rechitsa were not able to fulfill Premier League licensing criteria and remained in the First League.
Molodechno-2000 (who finished 13th last season) withdrew to the Second League due to insufficient financing.
| width=120 | Team | width=110 | Location | data-sort-type="number" | Position in 2004 |
|---|---|---|---|---|---|
| Lokomotiv | Vitebsk | Premier League, 15 | |||
| Belshina | Bobruisk | Premier League, 16 | |||
| Vedrich-97 | Rechitsa | 2 | |||
| Smorgon | Smorgon | 3 | |||
| Granit | Mikashevichi | 4 | |||
| ZLiN | Gomel | 5 | |||
| Veras | Nesvizh | 6 | |||
| Baranovichi | Baranovichi | 7 | |||
| Lida | Lida | 8 | |||
| Khimik | Svetlogorsk | 9 | |||
| Bereza | Bereza | 10 | |||
| Kommunalnik | Slonim | 11 | |||
| Torpedo-Kadino | Mogilev | 12 | |||
| Dnepr-DUSSh-1 | Rogachev | 14 | |||
| Smena | Minsk | Second League, 1 | |||
| Orsha | Orsha | Second League, 2 |
| Rank | width=170 | Goalscorer | width=170 | Team | Goals |
|---|---|---|---|---|---|
| 1 |  Ruslan Usaw | Lokomotiv Vitebsk | 32 | ||
| 2 | Dzmitry Asipenka | Smorgon | 17 | ||
| 3 | Aleksandr Chuduk | Baranovichi | 15 | ||
| 4 | Vadim Sugako | Kommunalnik Slonim | 13 | ||
| 5 | Dmitry Gavrilovich | Khimik Svetlogorsk | 12 | ||
| Sergey Vekhtev | Lokomotiv Vitebsk | 12 | |||
 Oleksiy Kopylchenko | Belshina Bobruisk | 12 | |||
| Andrey Chisty | Granit Mikashevichi | 12 |