Olympiacos swimming department was established roughly at the same time with the club's foundation in 1925. Olympiacos is considered the lifelong champion in swimming and has listed athletes, who were prominent in Greece and distinguished themselves in European events.
Greek Championship: 57
1929, 1930, 1931, 1932, 1933, 1934, 1937, 1960, 1961, 1962, 1967, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
Greek Cup of 25m pool: 4
1997, 1998, 1999, 2001
Greek Championship Open Water: 3
2010, 2015,2016
Greek super cup
2015
Winter Greek Championship: 28
1980, 1981, 1982, 1983, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996, 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2013
Greek Christmas Cup: 15
1992, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2013
Greek Championship of South Greece: 6
1931, 1932, 1933, 1934, 1935, 1939
Greek Championship of Center: 4
1961, 1966, 1967, 1968
Greek Championship of young girls: 10
1951, 1958, 1963, 1969, 1971, 1972, 1983, 1998, 2009, 2013
Greek Championship of teenagers: 15
1934, 1937, 1952, 1958, 1961, 1964, 1969, 1972, 1975, 1984, 1986, 1989, 1995, 1999, 2000
Greek Championship of maidens: 11
1947, 1951, 1958, 1962, 1967, 1974, 1978, 1979, 1981, 1988, 1999
Winter Greek Championship of South Greece maidens: 1
2013
International Swimming Meeting of Germany: 1
1970
International Swimming Meeting of Luxembourg: 1
1972
Although there is no sufficient information related to the exact year of establishment, nor the year of its official suspension, the Diving Department has won a considerable number of Greek championships since 1958. It is worth mentioning that the available information is up to 1997 as was stated within the Greek ministry of Sports http://www.sport.gov.gr
Greek Championship: 2
1970, 1971.
