Fourth Expansion In 1996, both the St. Clair Area League and the Macomb-Oakland Athletic Conference were disbanded.
St. Clair Area League: Macomb-Oakland Area Conference: In addition, Dakota High School also joined the MAC in 1996 after being built in Macomb Township the previous year, making for a total of 11 schools joining the conference that year.
† -Both Imlay City and Richmond left in 1999 to join the Southern Thumb Athletic Association ‡ -Algonac left in 2002 to join the newly formed Blue Water Area Conference * -South Lake rejoined the MAC after leaving four years prior Fifth Expansion In 2004, Madison Heights Madison and Madison Heights Lamphere, from the Oakland Activities Association, and New Haven, which previously ran an independent schedule, joined the MAC.
Seventh Expansion In 2019, Hazel Park, from the Oakland Activities Association, joined the MAC.
Macomb Dakota 4-1 6-2 Romeo 4-1 9-2 Warren Mott 3-1 8-2 L’anse Creuse Sterling Heights 4-1 4-1 6-4 6-4 **- denotes that the team won a state championship title that year