Olympiacos Men's Volleyball, commonly referred to as Olympiacos, Olympiacos Piraeus or with its full name as Olympiacos SFP, is the men's professional volleyball department of the major Greek multi-sport club, Olympiacos SFP, based in Piraeus, Attica. The department was founded in 1926 and their home ground is the Melina Merkouri Indoor Hall in Agios Ioannis Rentis, Piraeus.

Olympiacós Sýndesmos Filáthlon Peiraiós is a major multi-sport club based in Piraeus, Greece. Olympiacos is parent to a number of different competitive departments which participate in football, basketball, volleyball, water polo, handball, athletics, swimming, table tennis and boxing amongst many others—and have won numerous European and domestic titles over the club's history.