Massachusetts Interscholastic Athletic Association
The Massachusetts Interscholastic Athletic Association is an organization that sponsors activities in 36 sports, between more than 380 high schools in the U.S. state of Massachusetts. The MIAA serves over 220,000 student athletes from these schools. The MIAA is a member of the National Federation of State High School Associations, which writes the rules for most U.S. high school sports and activities. The MIAA was founded in 1978, and was preceded by both the Massachusetts Secondary School Principals Association and the Massachusetts Interscholastic Athletic Council .
Sports by season
Rugby became the MIAA's 35th sport in 2016, following a 2015 MIAC vote that passed by a wide majority. Girls wrestling gained MIAA status in 2019.
Districts and leagues
The leagues in the MIAA are separated into nine districts.District 1
District 2
District 3
- Midland Wachusett League
- Worcester County Athletic Conference
District 4
- Dual County League
- Merrimack Valley Conference
- Middlesex League
District 5
District 6
- Boston City League
- Catholic Central League
- Catholic Conference
- Massachusetts Charter School Athletic Conference
District 7
District 8
- Mayflower Athletic Conference
- South Coast Conference
- Southeast Conference
District 9
- Cape and Islands League
- Patriot League
- South Shore League
State champions
Most state championships
| Sport | Season | Most Championships |
| Baseball | Spring | Somerville, Braintree & St. Mary's Lynn |
| Boys Basketball | Winter | Durfee |
| Girls' Basketball | Winter | St. Mary's Lynn, Cathedral, Archbishop Williams, Lee |
| Field Hockey | Fall | Watertown |
| Football | Fall | Longmeadow |
| Boys' Ice Hockey | Winter | Catholic Memorial |
| Girls' Ice Hockey | Winter | Notre Dame Academy |
| Boys' Lacrosse | Spring | Longmeadow |
| Girls' Lacrosse | Spring | Westwood |
| Girls' Rugby | Spring | Belmont |
| Boys' Soccer | Fall | Bromfield |
| Girls' Soccer | Fall | Sutton |
| Boys' Swimming & Diving | Winter | Weston |
| Girls' Swimming & Diving | Fall/Winter | Acton-Boxborough & Andover |
| Girls' Volleyball | Fall | Barnstable |
| Boys' Volleyball | Spring | New Bedford |
| Boys' Rugby | Spring | Boston College High |
| Softball | Spring | Turners Fall |
| Girls' Gymnastics | Winter | Barnstable |
Basketball
The state champions for basketball are listed below.Boys' Basketball
| Rank | School | Number | Years |
| 1 | Durfee | 9 | 1947, 1948, 1952, 1956, 1966, 1977, 1984, 1988, 1989 |
| 2 | Cambridge Rindge & Latin | 8 | 1979, 1980, 1981, 1986, 1990, 2001, 2016, 2017 |
| 2 | Charlestown | 8 | 1959, 1978, 2000, 2001, 2002, 2003, 2005, 2024 |
| 4 | Somerville | 7 | 1944, 1945, 1949, 1950, 1955, 1958, 1971 |
| 5 | Catholic Memorial | 6 | 1962, 1965, 1969, 1970, 2008, 2015 |
Girls' Basketball
| Rank | School | Number | Years |
| 1 | Lee | 7 | 1989, 1990, 1991, 1993, 1997, 2003, 2010 |
| 1 | Archbishop Williams | 7 | 1996, 2007, 2008, 2013, 2015, 2017, 2018 |
| 1 | St. Mary's Lynn | 7 | 2002, 2011, 2014, 2020, 2022, 2023. 2025 |
| 1 | Cathedral | 7 | 2016, 2017, 2019, 2020, 2023, 2024, 2025 |
| 5 | Haverhill | 6 | 1987, 1989, 1992, 1994, 1995, 1996 |
| 5 | Walpole | 6 | 1984, 1989, 1994, 1995, 2002, 2004 |
| 5 | Hampshire | 6 | 1975, 1976, 1977, 1978, 2003, 2005 |
| 5 | Andover | 6 | 2003, 2010, 2011, 2012, 2020, 2023 |