French football club SEC Bastia's 1965–66 season.

Finished fourth place in league and thus qualified to play French Division 1 play-off for promotion.

Play-off matches took two wins and two defeats, and was unable rise in Division 1.

Coupe de France "last 32" round was eliminated in the defeated 1–0 in Ajaccio.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.