Olympiacos women's water polo team is one of the most successful clubs in Europe and a traditional powerhouse of continental water polo, having won the LEN Euroleague in 2015, the LEN Super Cup also in 2015 and the LEN Trophy in 2014 and having, overall, a commanding presence in European competitions. Besides their LEN Euroleague, LEN Super Cup and LEN Trophy titles, they were runners-up of the LEN Euroleague in 2017 and 2019, runners-up of the LEN Super Cup in 2014, runners-up of the LEN Trophy in 2008 and 2018 and they have participated, altogether, in 7 Champions' Cup / Euroleague Final Fours (1996, 2010, 2011, 2015, 2016, 2017, 2019), as well as in 5 LEN Trophy Final Fours (2001, 2007, 2008, 2014, 2018), being semi-finalists of the same competition in 2009 and 2012. Domestically, Olympiacos is the most successful Greek club, having won a shared record 11 Greek Championships, a record 2 Greek Cups, a record 1 Greek Super Cup and a record 2 Doubles. They also hold the all-time record for the most consecutive Greek Championships, as they are the only team to have won 7 consecutive Greek Championship titles (2014–2020).