The 2008–09 Slovenian PrvaLiga was the 18th season of top-tier football league in Slovenia. The competition was officially called PrvaLiga Telekom Slovenije for sponsorship reasons. The season started on 19 July 2008 and ended on 23 May 2009.
Clubs
Promotion and relegation
In the previous season, Livar were relegated to the Slovenian Second League after just one year in the top division, finishing last with only 17 points. Drava Ptuj successfully avoided relegation by beating Bonifika in the relegation play-offs.
Promoted to Slovenia's top football league were Second League champions Rudar Velenje, returning to PrvaLiga after a two-year absence.
League table
Relegation play-offs
The ninth-placed team of the PrvaLiga, Drava Ptuj, played a two-legged relegation play-off against the runners-up of the 2008–09 Slovenian Second League, Aluminij.
Drava Ptuj won 9–3 on aggregate.
Results
Each team played four times against their opponents, twice at home and twice on the road, for a total of 36 matches.