Southeastern Conference (MHSAA)

In 1973 Dundee left for the Michigan-Ohio Border Conference, and was replaced by Brighton, joining from the Wayne-Oakland League.

Parma Western joined that year, having been independent since leaving the Cascades Conference in 1976.

Tecumseh left the Huron League to join the Southeastern in 1980, bringing the conference to seven members.

The Southeastern scrapped the divisional format in 2006 in anticipation of another former South Central school joining that next year, Ann Arbor Huron.

The White Division consisted of Adrian, Chelsea, Dexter, Lincoln, Tecumseh, and another school leaving the Michigan Mega, Ypsilanti.

Locations of the members of the Southeastern Conference based on divisional setup.