The 2008–09 Premier League of Bosnia and Herzegovina (Bosnian: Premijer Liga) was the ninth season since its establishment and the seventh as a unified country-wide league.
It started on 2 August 2008 and ended on 23 May 2009.
Modriča were the defending champions.
Jedinstvo Bihać and Žepče were relegated after the 2007–08 season due to finishing in 15th and 16th place, respectively.
They were replaced by the champions of two second-level leagues, Zvijezda Gradačac (Prva Liga BiH) and Borac Banja Luka (Prva Liga RS).