A1 Ethniki Water Polo

The A1 Ethniki (Greek: Α1 Εθνική Κατηγορία), 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.

A1 Ethniki

Current season, competition or edition: 2024–25 A1 Ethniki
Sport	Water polo
Founded	1927 (1927)
Administrator	Hellenic Swimming Federation
No. of teams	16
Country	Greece
Confederation	LEN
Most recent champion	Olympiacos Piraeus (2025–26)
Most titles	Olympiacos Piraeus (40 titles)
Broadcaster	ERT
Level on pyramid	Level 1
Relegation to	A2 Ethniki Water Polo
Domestic cup	Greek Cup
International cups	LEN Champions League LEN Euro Cup
Official website	koe.org.gr

Olympiacos Piraeus has conquered the most Greek League titles, with 39. Ethnikos also has the record for consecutive championships, with 18.

History

• 1923-27: Panhellenic Championship (held by SEGAS)
• 1927–28 to 1965-66: Panhellenic Championship (held by Hellenic Swimming Federation)
• 1966–67 to 1985-86: A Ethniki (held by Hellenic Swimming Federation)
• 1986–87 to present: A1 Ethniki (held by Hellenic Swimming Federation)

Title holders

• 1922–23 Peiraikos
• 1925–26 Ethnikos Piraeus
• 1926–27 Olympiacos Piraeus
• 1927–28 Aris Thessaloniki
• 1928–29 Aris Thessaloniki (2)
• 1929–30 Aris Thessaloniki (3)
• 1930–31 Ethnikos Piraeus (2)
• 1931–32 Aris Thessaloniki (4)
• 1932–33 Olympiacos Piraeus (2)
• 1933–34 Olympiacos Piraeus (3)
• 1934–35 NO Patras
• 1935–36 Olympiacos Piraeus (4)
• 1936–37 NO Patras (2)
• 1937–38 NO Patras (3)
• 1938–39 NO Patras (4)
• 1939–40 NO Patras (5)
• 1941–44 Not held due to WW II
• 1944–45 NO Patras (6)
• 1945–46 NO Patras (7)
• 1946–47 Olympiacos Pireaus (5)
• 1947–48 Ethnikos Piraeus (3)
• 1948–49 Olympiacos Piraeus (6)
• 1949–50 NO Patras (8)
• 1950–51 Olympiacos Piraeus (7)
• 1951–52 Olympiacos Piraeus (8)
• 1952–53 Ethnikos Piraeus (4)
• 1953–54 Ethnikos Piraeus (5)
• 1954–55 Ethnikos Piraeus (6)
• 1955–56 Ethnikos Piraeus (7)
• 1956–57 Ethnikos Piraeus (8)
• 1957–58 Ethnikos Piraeus (9)
• 1958–59 Ethnikos Piraeus (10)
• 1959–60 Ethnikos Piraeus (11)
• 1960–61 Ethnikos Piraeus (12)
• 1961–62 Ethnikos Piraeus (13)
• 1962–63 Ethnikos Piraeus (14)
• 1963–64 Ethnikos Piraeus (15)
• 1964–65 Ethnikos Piraeus (16)
• 1965–66 Ethnikos Piraeus (17)
• 1966–67 Ethnikos Piraeus (18)
• 1967–68 Ethnikos Piraeus (19)
• 1968–69 Ethnikos Piraeus (20) &
  Olympiacos Piraeus (9)
• 1969–70 Ethnikos Piraeus (21)
• 1970–71 Olympiacos Piraeus (10)
• 1971–72 Ethnikos Piraeus (22)
• 1972–73 Ethnikos Piraeus (23)
• 1973–74 Ethnikos Piraeus (24)
• 1974–75 Ethnikos Piraeus (25)
• 1975–76 Ethnikos Piraeus (26)
• 1976–77 Ethnikos Piraeus (27)
• 1977–78 Ethnikos Piraeus (28)
• 1978–79 Ethnikos Piraeus (29)
• 1979–80 Ethnikos Piraeus (30)
• 1980–81 Ethnikos Piraeus (31)
• 1981–82 Ethnikos Piraeus (32)
• 1982–83 Ethnikos Piraeus (33)
• 1983–84 Ethnikos Piraeus (34)
• 1984–85 Ethnikos Piraeus (35)
• 1985–86 ANO Glyfada
• 1986–87 ANO Glyfada (2)
• 1987–88 Ethnikos Piraeus (36)
• 1988–89 ANO Glyfada (3)
• 1989–90 ANO Glyfada (4)
• 1990–91 NO Vouliagmeni
• 1991–92 Olympiacos Piraeus (11)
• 1992–93 Olympiacos Piraeus (12)
• 1993–94 Ethnikos Piraeus (37)
• 1994–95 Olympiacos Piraeus (13)
• 1995–96 Olympiacos Piraeus (14)
• 1996–97 NO Vouliagmeni (2)
• 1997–98 NO Vouliagmeni (3)
• 1998–99 Olympiacos Piraeus (15)
• 1999–00 Olympiacos Piraeus (16)
• 2000–01 Olympiacos Piraeus (17)
• 2001–02 Olympiacos Piraeus (18)
• 2002–03 Olympiacos Piraeus (19)
• 2003–04 Olympiacos Piraeus (20)
• 2004–05 Olympiacos Piraeus (21)
• 2005–06 Ethnikos Piraeus (38)
• 2006–07 Olympiacos Piraeus (22)
• 2007–08 Olympiacos Piraeus (23)
• 2008–09 Olympiacos Piraeus (24)
• 2009–10 Olympiacos Piraeus (25)
• 2010–11 Olympiacos Piraeus (26)
• 2011–12 NO Vouliagmeni (4)
• 2012–13 Olympiacos Piraeus (27)
• 2013–14 Olympiacos Piraeus (28)
• 2014–15 Olympiacos Piraeus (29)
• 2015–16 Olympiacos Piraeus (30)
• 2016–17 Olympiacos Piraeus (31)
• 2017–18 Olympiacos Piraeus (32)
• 2018–19 Olympiacos Piraeus (33)
• 2019–20 Olympiacos Piraeus (34)
• 2020–21 Olympiacos Piraeus (35)
• 2021–22 Olympiacos Piraeus (36)
• 2022–23 Olympiacos Piraeus (37)
• 2023–24 Olympiacos Piraeus (38)
• 2024–25 Olympiacos Piraeus (39)
• 2025–26 Olympiacos Piraeus (40)

Titles by club

No.	Club	Winners	Winning years
1.	Olympiacos Piraeus	40	1927, 1933, 1934, 1936, 1947, 1949, 1951, 1952, 1969*, 1971, 1992, 1993, 1995, 1996, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
2.	Ethnikos Piraeus	38	1926, 1931, 1948, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969*, 1970, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1988, 1994, 2006
3.	NO Patras	8	1935, 1937, 1938, 1939, 1940, 1945, 1946, 1950
4.	Aris Thessaloniki	4	1928, 1929, 1930, 1932
5.	ANO Glyfada	4	1986, 1987, 1989, 1990
6.	NO Vouliagmeni	4	1991, 1997, 1998, 2012
7.	Peiraikos	1	1923

* The 1969 Championship was shared between Olympiacos and Ethnikos

Consecutive championships

18 in a row

• Ethnikos Piraeus→1953–1970

14 in a row

• Ethnikos Piraeus→1972–1985

• Olympiacos Piraeus→2013–2026

9 in a row

• Olympiacos Piraeus→1999–2005

6 in a row

• NO Patras→1937–1946

5 in a row

• Olympiacos Piraeus→2007–2011

3 in a row

• Aris Thessaloniki→1928–1930

2 in a row

• Olympiacos→1933–1934, 1951–1952, 1992–1993, 1995–1996

• ANO Glyfada→1986–1987, 1989–1990

• NO Vouliagmeni→1997–1998

Appearances in A' Ethniki (1967―2025)

A' Ethniki (National Division) started in 1967, but the Greek championship started in 1923 as a Panhellenic Championship. The Hellenic Swimming Federation declares all championship winning teams as champions from 1928 and onwards. Teams in bold participate in the 2024–25 season.

App Club 59 Olympiacos S.F. Piraeus 57 Ethnikos O.F. Piraeus 50 Chios Nautical Club 47 Panathinaikos Athens 46 NO Patras 45 Vouliagmeni Nautical Club 45 Glyfada Athletic Nautical Club 37 Palaio Faliro Athletic Club 30 P.A.O.K. Thessaloniki 29 Chania Nautical Club 25 Panionios G.S.S. (Athens) 16 Iraklis Thessaloniki

App Club 16 Kerkyra Nautical Athletic Club 14 Volos - Argonaftes Nautical Club 13 Kalamaki Nautical Club 11 Ydraikos Nautical Club 10 Aris Thessaloniki 8 O.F. Thalassis Thessaloniki 8 Apollon Smyrnis 7 Chalcis Nautical Club 7 Ilisiakos Athletic Club Athens 6 Poseidon Ilision SC (Athens) 6 NE Patras 6 Peristeri Gymnastic Club

App Club 5 E.N.O. Egyptioton Athens 5 A.E.K. Athens 3 Argostoli Nautical Club 3 Nireas Chalandri Athletic Club 3 Mytilene Nautical Club 3 G.N.O. Aris Nikaias 3 Larissa Nautical Club 2 Nireas Lamia Gymnastic Club 2 Ilioupolis Gymastic Club (Athens) 2 O.Y.K. Volos 1 O.F.I. (Heraklion) 1 Phoenix Piraeus

Greek clubs in European competitions

Club		Champions League					Euro Cup					Cup Winners' Cup (defunct)					Super Cup
		C	Years	RU	SF		C	Years	RU	SF		C	Years	RU	SF		C	Years	RU
Olympiacos Piraeus		2	2002,2018	3	1		–					0		2			1	2002	1
Ethnikos Piraeus		0		0	1		0		0	1		0		0			–
NO Vouliagmeni		0		0	1		0		1	2		1	1997	0	1		–
Panionios		0		0	0		0		2	2		–					–
NO Patras		–					0		1	0		–					–

External links

• Hellenic Swimming Federation (in Greek)
• Eleftherotypia
• Star Channel
• Novasport Fm