Original Puma football shirt Olympiacos Piraeus 2012/13

The 2012–13 season was Olympiacos' 54th consecutive season in the Superleague Greece. They competed in the Greek Superleague, Greek Cup, UEFA Champions League and UEFA Europa League.

Olympiacos completed a domestic double, winning the Superleague and the Greek Cup. Olympiacos won the title for a third consecutive season, reaching 40 domestic titles and therefore adding a fourth star to the team's shirt.

The club finished third in Group B of the Champions League, which resulted in them entering the Europa League. Olympiacos was eliminated in Round of 32 by Levante with two defeats, falling 0–4 on aggregate.