The conference was founded in 1980, and consists of schools in the Berkshire, Franklin, Hampden, and Hampshire counties of Massachusetts.

[1] The league is made up of a mix of public, charter, vocational/technical, and Christian high schools.

*Note: Pope Francis Prep was established under the name Cathedral High School in 1883; in 2015 it merged with Holyoke Catholic High School and became Pope Francis Prep Western Mass High School Football Champions are listed below: Prior to the 2013 MIAA football realignment, Western Mass teams played each other for State rights.

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