Margaretta High School is a public high school in Castalia, Ohio. It is the only high school in the Margaretta Local Schools district. They are members of the Sandusky Bay Conference.Sandusky Bay Conference championships (1963-present)Football: 1983*, 1985, 1986, 1991*, 1995*, 1996, 1997, 2001 Volleyball: 1987, 1997, 1998, 2010*Girls Cross Country: 1983, 1984, 1993, 1994Boys Basketball: 1963-64, 2003–04Girls Basketball: 1985-86*, 1986–87, 1987–88, 1988-89*, 1990–91, 1991-92*, 1992–93, 1993–94, 1994–95, 1998–99, 2000-01*, 2001-02*, 2004–05, 2005–06, 2008–09Baseball: 1970, 1974*, 1975, 1978, 1985, 1986*, 1989, 1990*, 1993Softball: 1983*, 1984, 1985, 1987, 1988, 1989, 1990, 1992*, 1993Boys Track & Field: 1972Girls Track & Field: 1994, 1995, 1997 sourceOhio High School Athletic Association State Championships Boys Basketball – 1932