Olympiacos Men's Waterpolo (Greek: Ολυμπιακός, [olimbiaˈkos]), commonly referred to as Olympiacos, Olympiacos Piraeus or with its full name as Olympiacos CFP, is the men's water polo department of the major Greek multi-sport club, Olympiacos CFP, based in Piraeus, Greece. The department was founded in 1925, one of the founding members of the Hellenic Swimming Federation, and their home ground is the Papastrateio Pool in Piraeus.