Olympiakos may refer to:

• Olympiacos CFP, a multisport club in Piraeus,Greece
• Olympiakos Nicosia, a football club in Nicosia, Cyprus
• Ethnikos Olympiakos Volos F.C., a football club in Volos, Greece
• ASK Olympiakos Volos F.C., a former football club in Volos, Greece
• Olympiakos Patras, a multisport club in Patras, Greece
• Olympiakos Aigio, a football club in Aigio, Greece
• Olympiakos Chersonissos F.C., a football club in Chersonissos, Crete, Greece
• Olympiakos Argostoli, a football club in Argostoli, Kefalonia, Greece
• Olympiakos Kamares, a football club in Kamares, Greece
• Olympiakos Kalamata, a football (soccer) club in Kalamata, Greece
• Olympiakos Neon Liosion, a football club in Ilio, Athens, Greece
• Olympiacos Kato Pelagitsas, a football club in Komotini, Greece
• Olympiakos Analypsi, a football (soccer) club in Analypsi, Messinia, Greece

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