2015 was the 45th year of high school boys water polo in the state of Washington.  During that time, nine programs have been crowned state champions: Bainbridge Island, Bellevue, Curtis, Lakes, Mercer Island, Puyallup, Rogers, Sammamish and Wilson. Click on the year for full results, including All-State teams.

Boys Water Polo State Champions:
2018 – Curtis
2017 – Curtis
2016 – Curtis
2015 – Curtis
2014 – Bellevue
2013 – Bellevue
2012 – Bellevue
2011 – Bellevue
2010 – Mercer Island
2009 – Mercer Island
2008 – Mercer Island
2007 – Mercer Island
2006 – Mercer Island
2005 – Mercer Island
2004 – Mercer Island
2003 – Mercer Island
2002 – Mercer Island
2001 – Mercer Island
2000 – Mercer Island
1999 – Sammamish
1998 – Mercer Island
1997 – Mercer Island
1996 – Bainbridge Island
1995 – Bainbridge Island
1994 – Curtis
1993 – Curtis
1992 – Curtis
1991 – Curtis
1990 – Curtis
1989 – Curtis
1988 – Curtis
1987 – Curtis
1986 – Rogers
1985 – Puyallup
1984 – Puyallup
1983 – Puyallup
1982 – Lakes
1981 – Puyallup
1980 – Puyallup
1979 – Puyallup
1978 – Puyallup
1977 – Puyallup
1976 – Puyallup
1975 – Puyallup
1974 – Puyallup
1973 – Puyallup
1972 – Wilson

Girls Water Polo State Champions
2018 – Curtis
2017 – Gig Harbor
2016 – Gig Harbor
2015 – Gig Harbor
2014 – Gig Harbor
2013 – Curtis
2012 – Gig Harbor
2011 – Gig Harbor | Newport
2010 – Gig Harbor | Roosevelt
2009 – Curtis | CPA
2008 – Curtis | Newport
2007 – Curtis | Newport
2006 – Wilson | Mercer Island
2005 – Wilson | Mercer Island
2004 – Wilson | Bainbridge Island
2003 – Mercer Island
2002 – Mercer Island
2001 – Mercer Island
2000 – Mercer Island
1999 – Mercer Island
1998 – Mercer Island
1997 – Bainbridge Island
1996 – Bainbridge Island
1995 – Bainbridge Island
1994 – Bainbridge Island
1993 – Bainbridge Island
1992 – Bainbridge Island
1991 – Bainbridge Island
1990 – Bainbridge Island