• Baseball (WIAA Division 2): 2010
• Girls Cross Country (WIAA Division 2): 2024
• Field Hockey (WHSFHA): 2022, 2021, 2014, 2011, 2010, 2009, 2005, 2003, 2002, 2001, 2000, 1991
• Boys Hockey (WIAA Division 1): 2019, 2010, 2006
• Girls Hockey (WIAA Division 1): 2015
• Girls Lacrosse (WLF): 2022, 2021
• Girls Skiing (WIARA): 2024
• Boys Soccer (WIAA Division 4): 2018, 2013
• Girls Soccer (WIAA Division 3): 2008
• Boys Tennis (WIAA Division 2): 2025, 2015, 2014, 2013, 2011, 2010, 2009, 2008, 2007, 2006, 2004
• Girls Tennis (WIAA Division 2): 2023, 2022, 2018, 2017, 2014, 2012, 2011, 2007, 2006, 2005, 2004

*Championships since 2000

• 2025 WIAA Girls Track and Field: Bella Grenier '25, 3200-meter run
• 2023 WIAA Girls Tennis: Angela Wang '26, singles
• 2023 WIAA Girls Tennis: Mia Darr '25 and Isabel Werner '24, doubles
• 2023 WIAA Boys Tennis: Max Watchmaker '23, singles
• 2022 WIAA Girls Swimming: Lucy Art '23, 50-yard freestyle 
• 2022 WIAA Boys Tennis: Max Watchmaker '23, singles
• 2021 WIAA Girls Tennis: Rebecca Daskal '22 and Isabel Werner '24, doubles
• 2020 WIAA Girls Tennis: Kala Siddalingaiah '21 and Rebecca Daskal '22, doubles
• 2018 WIAA Boys Swimming: Ben Hayes '18, 100-yard butterfly and 200-yard individual medley
• 2017 WIAA Girls Tennis: Veda Sane '19, singles
• 2017 WIAA Boys Swimming: Ben Hayes '18, 100-yard breaststroke and 200-yard individual medley
• 2015 WIAA Boys Tennis: Kai Sane '17, singles
• 2015 WIAA Boys Tennis: Andrew Buchanan '15 and Zach Schneck '16, doubles
• 2015 WIAA Girls Tennis: Riley Strauss '18 and Caroline Taylor '16, doubles
• 2014 WIAA Boys Track and Field: Djdade Denson '14, triple jump
• 2013 WIAA Girls Tennis: Julia Veitinger '15 and Taylor Benard '15, doubles
• 2012 WIAA Girls Tennis: Ali Pollack '16, singles
• 2011 WIAA Girls Tennis: Riley Kelly '12 and Rebecca Buchanan '12, doubles
• 2011 WIAA Boys Tennis: Andrew Hwang '11, singes
• 2010 WIAA Girls Tennis: Maddy Ecker '13, singles
• 2009 WIAA Boys Tennis: Nick Buckley '09, singles
• 2009 WIAA Boys Tennis: Ryan Stewart '09 and Sam Walker '11, doubles
• 2008 WIAA Boys Tennis: Nick Buckley '09, singles
• 2007 WIAA Girls Tennis: Sarah VandenBerg '08 and Saira Khanna '10, doubles
• 2006 WIAA Boys Tennis: Nick Buckley '09 and Ryan Rusch '06, doubles
• 2003 WIAA Girls Track and Field: Preethi Chintamaneni '03, Tope Awe '03, Lisa Melick '03, and Yemi Adetiba '06, 400-meter relay
• 2002 WIAA Boys Cross Country: Alex Reinhart '03

*Championships since 2000

• Baseball: 2010
• Boys Cross Country: 2024, 2002
• Girls Cross Country: 2024
• Boys Golf: 2025, 2024, 2021, 2004, 2003, 2002, 2001
• Boys Hockey: 2023, 2022, 2021, 2020, 2019, 2010, 2008, 2006, 2005, 2004, 2003, 2002, 2001, 1998
• Girls Hockey: 2015, 2010
• Girls Lacrosse: 2024
• Boys Soccer: 2020, 2018, 2015, 2013, 2008
• Girls Soccer: 2008
• Boys Tennis: 2025, 2023, 2018, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2004, 2003
• Girls Tennis: 2025, 2023, 2022, 2018, 2017, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004
• Girls Track and Field: 2025

• Baseball: 2012, 2010, 2009, 2008
• Boys Basketball: 2006
• Boys Cross Country: 2002
• Boys Golf: 2024, 2022, 2015, 2014, 2009, 2008, 2007, 2005, 2004, 2003, 2002, 2001
• Boys Hockey: 2025
• Girls Lacrosse: 2025, 2024
• Boys Soccer: 2023, 2022, 2020, 2018, 2017, 2016, 2015, 2013, 2012, 2010, 2008, 2004, 2003, 2002
• Girls Soccer: 2023, 2016, 2014, 2013, 2010, 2008, 2007, 2006, 2005, 2004
• Boys Tennis: 2009, 2008
• Girls Tennis: 2007
• Girls Track and Field: 2025, 2024, 2002
• Volleyball: 2018, 2016

• Baseball: 2023, 2022, 2017, 2012, 2010, 2008, 2005, 1979
• Boys Basketball: 2017, 2001, 1992, 1990, 1975, 1974
• Girls Basketball: 2002, 1976
• Boys Cross Country: 2024, 2019, 2018, 2014, 2013, 2012, 2002, 1983, 1979, 1978, 1977, 1976, 1975
• Girls Cross Country: 2024, 2022, 2021, 2019, 2014, 2003
• Field Hockey: 2014, 2013, 2011, 2010, 2009, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1991, 1984, 1981, 1978, 1977, 1976, 1975
• Football: 2011, 2007, 2002, 1998, 1994, 1978, 1974, 1970, 1965, 1964
• Boys Golf: 2025, 2024, 2022, 2021, 2018, 2015, 2011, 2008, 2007, 2003, 2002, 1998, 1965
• Boys Ice Hockey: 2021, 2019, 2016, 2014, 2010, 2006, 2005, 2002, 2001, 1998, 1995, 1992
• Girls Ice Hockey: 2023, 2022, 2021, 2018, 2016, 2015, 2010
• Boys Lacrosse: 2025, 2024, 2023, 2019, 2018
• Girls Lacrosse: 2025, 2024, 2023, 2022, 2021, 2019
• Boys Soccer: 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2013, 2012, 2011, 2010, 2009, 2008, 1999, 1996, 1995, 1993, 1992, 1990, 1989, 1987, 1983, 1982, 1975
• Girls Soccer: 2008, 2007, 2006, 2005, 2002, 2000, 1999, 1996
• Swimming: 1979
• Boys Tennis: 2012, 2011, 2010, 2008, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1991, 1990, 1989, 1988, 1987, 1986, 1985, 1984, 1983, 1982, 1981, 1980, 1979, 1978, 1977, 1976, 1975, 1974, 1973, 1972, 1971, 1970, 1969, 1968, 1967, 1966, 1965
• Girls Tennis: 2011, 2010, 2009, 2007, 2006, 2005, 2004, 1999, 1998, 1995, 1994, 1993, 1992
• Boys Track and Field: 2022, 2021, 2019, 2016, 2015, 2003, 1992, 1991, 1990, 1979, 1977, 1976, 1975, 1972, 1971, 1966
• Girls Track and Field: 2022, 2019, 2018, 2017, 2007, 2004, 2003, 2002, 2001, 1976
• Girls Volleyball: 2018, 2004, 1998