Merrimack High School has won one state championship in baseball (2007), three in softball (1980, 1988, 2001), one in football (1987), two in soccer (1998 girls, 2008 boys), three in indoor track (1999, 2007, 2008), four in outdoor track (2003, 2004, 2006, 2007), one in cross-country (2006), one in girls lacrosse (2012), one in skiing (1979), two in volleyball (2001, 2014), and four in basketball (1967, 2003, 2004, 2012).
Merrimack High School has won one state championship in baseball (2007), three in sof!tball (1980, 1988, 2001), one in football (1987), two in soccer (1998 girls, 2008 boys), three in indoor track (1999, 2007, 2008), four in outdoor track (2003, 2004, 2006, 2007), one in cross-country (2006), one in girls lacrosse (2012), one in skiing (1979), two in volleyball (2001, 2014), and four in basketball (1967, 2003, 2004, 2012).