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A1 Ethniki Women's Water Polo
Founded	1988
Country	Greece
Confederation	KOE
Number of clubs	12
Relegation to	A2 Ethniki Women's Water Polo
International cup(s)	LEN Euro League
Current champions	Olympiacos SFP ; (2023–24)

The Greek Women's Water Polo A1 League (Greek: Ελληνικό Πρωτάθλημα Υδατοσφαίρισης της Α1 Γυναικών) is the premier championship for women's water polo teams in Greece. It was founded in 1988, and it is currently contested by twelve teams.^[1] Greek League is ranked as one of the top national domestic leagues in European water polo. The champion, the runner-up and the third-placed team qualify for the LEN Euro League.^[2]

The first champion was Ethnikos Piraeus. In the following years until 2008 ANO Glyfada and NO Vouliagmeni dominated. In the next five years, Olympiacos Piraeus and Vouliagmeni were alternating at the top of the championship, but in the last decade Olympiacos Piraeus has been completely dominated.

Only four teams have won the championship so far. Olympiacos Piraeus have won the most championships (15), while being also the current champion (2023–24).

Greek clubs are among the most successful in European water polo. They have won fifteen titles in all European competitions. The teams have won the LEN Champions' Cup / LEN Euro League seven times, the LEN Super Cup and the LEN Trophy four times each. Concretely, Vouliagmeni have won two Champion Cups (2009, 2010), two LEN Super Cups (2009, 2010) and one LEN Trophy (2003), Olympiacos have won three LEN Euro Leagues (2015, 2021, 2022), three LEN Super Cup (2015, 2021, 2022) and one LEN Trophy (2014), Glyfada have won two Champion Cups (2000, 2003), and Ethnikos Piraeus have won two LEN Trophy cups (2010, 2022).

Champions

**A Ethniki**
Season	Champion
1987–88	Ethnikos Piraeus
1988–89	Glyfada NSC
1989–90	Ethnikos Piraeus
1990–91	NC Vouliagmeni
1991–92	Ethnikos Piraeus
1992–93	NC Vouliagmeni
1993–94	NC Vouliagmeni
1994–95	Olympiacos
1995–96	Glyfada NSC
1996–97	NC Vouliagmeni
1997–98	Olympiacos

**A1 Ethniki**
Season	Champion
1998–99	Glyfada NSC
1999–00	Glyfada NSC
2000–01	Glyfada NSC
2001–02	Glyfada NSC
2002–03	NC Vouliagmeni
2003–04	Glyfada NSC
2004–05	NC Vouliagmeni
2005–06	NC Vouliagmeni
2006–07	NC Vouliagmeni
2007–08	Glyfada NSC
2008–09	Olympiacos

**A1 Ethniki**
Season	Champion
2009–10	NC Vouliagmeni
2010–11	Olympiacos
2011–12	NC Vouliagmeni
2012–13	NC Vouliagmeni
2013–14	Olympiacos
2014–15	Olympiacos
2015–16	Olympiacos
2016–17	Olympiacos
2017–18	Olympiacos
2018–19	Olympiacos
2019–20	Olympiacos

**A1 Ethniki**
Season	Champion
2020–21	Olympiacos
2021–22	Olympiacos
2022–23	Olympiacos
2023–24	Olympiacos

Performance by club

Club	Titles	Winning years
Olympiacos Piraeus	15	1995, 1998, 2009, 2011, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
NC Vouliagmeni	11	1991, 1993, 1994, 1997, 2003, 2005, 2006, 2007, 2010, 2012, 2013
Glyfada NSC	8	1989, 1996, 1999, 2000, 2001, 2002, 2004, 2008
Ethnikos Piraeus	3	1988, 1990, 1992