[3] The Mid-Wach sponsors eighteen different sports across all divisions in the MIAA, and is the main league in central Massachusetts.

In 1992, three years after the Mid-Wach was formed, Westford Academy left for the Dual County League for more recognition and a chance to fit in better with the other schools.

A year later, The Mid-Wach admitted Bromfield, Tahanto, and West Boylston all from the Dual Valley League, which brought the total membership up to an even twenty-five.

[5] It wasn't until 2011 where the league changed again, this time admitting Tyngsborough from the Dual County, who was outclassed in most sports in the DCL.

[6] A year later, longtime member Milford elected to leave for the Hockomock League, citing travel expenses as one of the main reasons for the move.