The Bay State Conference, is an interscholastic high school athletic league located in the Metro Boston, Metrowest, and Southeastern Massachusetts (South Shore) regions of the United States. The Bay State Conference is named after the nickname of Massachusetts which is the bay state. As of 2021-2022, the Bay State Conference consists of 10 member schools. All Bay State Conference member schools are public secondary schools and also members of the Massachusetts Interscholastic Athletic Association (MIAA) in District 7 (along with the Hockomock League and the Tri-Valley League in the same regions). The Bay State Conference is known to be one of the most competitive conferences in the MIAA with some of the biggest high schools in the state of Massachusetts. In most sports members are in MIAA