Thriamvos Patras (Greek: ΑΟ Θρίαμβος Πατρών) was founded in 1991 and had athletic clubs including water polo, swimming, synchronized diving, basketball, chess and ping pong.
In 2001, its dodgeball club united with Foinikas Patras and changed its name to AS Ormi Patras, the polo and swimming dissolved in 2006 and OPATHA and it became NE Patras.
Achaea or Achaia, sometimes transliterated from Greek as Akhaia, is one of the regional units of Greece. It is part of the region of Western Greece and is situated in the northwestern part of the Peloponnese peninsula. The capital is Patras which is the third largest city in Greece.

Achaea Football Clubs Association is one of the oldest Greek amateur football clubs associations, representing teams from the Greek regional unit of Achaea.
Olympiacos Men's Waterpolo, commonly referred to as Olympiacos, Olympiacos Piraeus or with its full name as Olympiacos CFP, is the professional 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.

A.S. Apollon Patras is a multi-sports club that is based in Patras, Greece. It has included sports sections in association football, basketball, table tennis, and volleyball. The club is named after the ancient Greek God Apollo, and its team colours are black and white.

APS Olympiacos Patras is a sports club in Patras, playing association football and volleyball. The team plays with the EPS Achaias and the EPO number 1788.
Agios Dimitrios A.C. is an athletic club in Patras in the upper city neighbourhood in the Achaia prefecture. Its jersey colours are red and white and it plays in the Achaia Football Clubs Association. It has the number EPO 1865. The team had played for many years in the third division. The team also has a basketball team.

Thyella ("Storm")(Greek: Α.Π.Σ. Θύελλα A.P.S. Thyella) is an athletic club in Patras in the Achaia prefecture.
Sports clubs based in Patras, Greece.
Ethnikos Piraeus is a Greek multisport club based in Piraeus. It was founded in 1923. The full name of the club is Ethnikos Omilos Filathlon Pireos/Phalirou or Ethnikos OFPF, which means National Club of Fans of Piraeus and Phalerum. Ethnikos has sections in football, basketball, volleyball, waterpolo, swimming. In most of these sports, Ethnikos has won titles and honours. The most successful department is by far the water polo, which has won many domestic and European titles. Nevertheless, the most popular is the football team, which had a remarkable tradition in the first division in the past.

Apollon Patras B.C., named after the Greek God Apollo, is a Greek professional basketball club that is located in Patras, Greece. Apollon Patras B.C. is the men's basketball club of the Greek multi sports athletic union A.S. Apollon Patras. The club's name sponsorship is Apollon Patras B.C. Carna. Currently, Apollon competes in the Greek Basket League, which is the 1st-tier level basketball division in Greece.
E.A. Patras is a Greek omnisports club founded in 1927 and based in Patras. It is mostly known for its volleyball and boxing sections, which compete at the highest level in Greece. The volleyball section won the Greek championship in 1938, whereas the boxing section won the national title in 1979, 1983, 1984, 1988 and 1989.
NO Patras (NOP),, is a water polo club participating in the First Division of the Greek Championship.
Brian Alexander is a former American water polo player who was a member of the United States men's national water polo team.
The A1 Ethniki, often referred to as the Greek Water Polo League, is the highest professional water polo league in Greece. It is run by the Hellenic Swimming Federation. It is considered one of the top national leagues in European water polo, as its clubs have made significant success in European competitions.
Ethnikos Piraeus Water Polo Club is the professional water polo team of Ethnikos OFPF.

NO Vouliagmeni or "NOV" is a major aquatic sports club, founded by local sportsmen in 1937 in the seaside resort of Vouliagmeni, Athens, Greece. The club is located on the eastern edge of the Mikro Kavouri peninsula, adjacent to the Astir Palace Hotel and overlooking the bay, town and lake of Vouliagmeni.

Panachaiki F.C. is a Greek professional football club based in Patras, Greece and they play in Super League Greece 2, the second tier of Greek football. Founded in 1891, they have reached the Greek Cup semi-finals twice, as well as the quarter-finals on ten occasions. Moreover, they were the first Greek club outside both the Athens and Thessaloniki metropolitan areas to represent Greece in a European competition, the 1973–74 UEFA Cup.

NE Patras (NEP), Nautical Union of Patras, is a water polo and swimming club situated in Patras, Greece.
The Piraeus derby, is an association football and water polo rivalry between Ethnikos Piraeus and Olympiacos, the 2 teams representing the city of Piraeus.
Michail "Michalis" Kouretas is a retired Greek water polo player and a FINA and LEN-listed water polo referee.