The 2008–09 season was Beşiktaş' 105th football season. Also it was the 50th year of the Süper Lig. Beşiktaş won the league as well as the Turkish Cup.

Ismet badem

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

* Also holds German citizenship. ** Also holds Australian citizenship.

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Ground: A = Away; H = Home. Result: D = Draw; L = Loss; W = Win; P = Postponed.

Source:
Rules for classification: 1st points; 2nd head-to-head points; 3rd head-to-head goal difference; 4th head-to-head goals scored; 5th head-to-head away goals scored; 6th goal difference; 7th goals scored
¹Since Türkiye Kupası 2008–09 winners Beşiktaş qualified for the UEFA Champions League and losing finalists Fenerbahçe also finished in the top four, fifth-placed team Galatasary qualified for the UEFA Europa League as well.
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.

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