The current iteration of the conference was founded in 1975[2] with schools Fitchburg, Gardner, Holy Name, Leominster, St. Bernard's, St. John's, St. Peter's (which would become St. Peter-Marian a year later after merging with Marian High), and Wachusett.[3] It wasn't long until members began leaving however, Gardner being the first to go join the massive Wachusett League in the fall of 1980.[4] The conference remained stable for the better half of the decade until 1988, when Fitchburg, Leominster and Wachusett all left for the Midland League.[5] By now, all schools had dwindling enrollment sizes except for St. John's who was easily overpowering the others in athletics. This led to St. John's leaving for the Catholic Conference in 2021.[6]
*St. Paul Diocesan was originally founded as Holy Name High school in 1942. In 2020 it merged with Saint Peter-Marian High School to become St. Paul Diocesan
Note: From 1972 to 2012, football state championships were separated by region, so there would be multiple champions from each division. From 1972 to 1977 and from 1997 to 2008, it was split between Eastern Mass and Central/Western Mass and there would be two champions in each division. From 1978 to 1996 and from 2009 to 2012 Central and Western Mass split so there would be three champions in each division. In 2013 everything was combined and therefore only allowed one state champion per division.
