| Competition: | First League of the Republika Srpska |
| Season: | 2008–09 |
| Winners: | Rudar (P) 1st First League title |
| Promoted: | Rudar (P) |
| Relegated: | Borac (Š) Glasinac Jedinstvo |
| Matches: | 182 |
| Total Goals: | 592 |
| League Topscorer: | Mirko Marinković (19 goals) |
| Prevseason: | 2007–08 |
| Nextseason: | 2009–10 |
The 2008–09 First League of the Republika Srpska season was the fourteenth since its establishment.