2008–09 TFF 1. Lig
| Season | 2008–09 | 
|---|---|
| Champions | Manisaspor | 
| Promoted | Manisaspor, Diyarbakırspor, Kasımpaşa | 
| Relegated | Sakaryaspor, Güngören, Malatyaspor | 
| Matches played | 306 | 
| Goals scored | 752 (2.46 per match) | 
| Top goalscorer | Bruno Mezenga (21) | 
| Biggest home win | Ordu 5–0 Güngören | 
| Biggest away win | Karabük 0–6 Kasımpaşa | 
| Highest scoring | Karabük 6–3 Manisa | 
| ← 2007–08  2009–10 →  | |
The 2008–09 TFF 1. Lig (referred to as the Bank Asya 1. Lig for sponsorship reasons) was the second-level football league of Turkey and the 46th season since its establishment in 1963–64. At the end of the season in which 18 teams competed in a single group, Manisaspor and Diyarbakırspor, which finished the league in the first two places, and the play-off winner Kasımpaşa were promoted to the upper league, while Sakaryaspor, Güngören Belediyespor and Malatyaspor, which were in the last three places, were relegated.