Southeastern Conference (MHSAA)
The Michigan High School Athletic Association Southeastern Conference (MHSAA SEC) is a high school sports conference composed of schools (all public) in three different counties in the state of Michigan. The SEC is split into two divisions, Red and White, based on enrollment. Currently, there are 13 members of the SEC. Pinckney rejoined the conference and placed in the white division. Jackson will join the white division in 2018. The conference is looking for 2 more teams to join the sec red division
|Ann Arbor Huron||River Rats||Ann Arbor||1996||1,823||A||Green and Gold||Independent|
|Ann Arbor Pioneer||Pioneers||Ann Arbor||2008||1,893||A||Purple and White||Independent|
|Ann Arbor Skyline||Eagles||Ann Arbor||2009||1,715||A||Columbia Blue and White||None (school opened)|
|Monroe||Trojans||Monroe||2009||2,145||A||Red and White||Michigan Mega Conference|
|Saline||Hornets||Pittsfield Township||1964||1,897||A||Navy and Gold||Washtenaw County League|
|Temperance Bedford||Kicking Mules||Bedford Township||2000||1,600||A||Scarlet and Gray||Great Lakes League|
|Adrian||Maples||Adrian||2000||804||B||Royal Blue and White||Independent|
|Chelsea||Bulldogs||Chelsea||1964||877||B||Navy and Gold||Washtenaw County League|
|Dexter||Dreadnaughts||Scio Township||1964||1,171||A||Maroon and Gold||Washtenaw County League|
|Tecumseh||Indians||Tecumseh||1980||869||B||Orange and Black||Huron League|
|Ypsilanti||Grizzlies||Ypsilanti Township||2009||1,399||A||Black and Gold||Michigan Mega Conference|
|Ypsilanti Lincoln||Railsplitters||Augusta Township||1964||1,460||A||Royal Blue and Grey||Huron League|
|School||Nickname||Location||Colors||Joined||Previous Conference||Departed||Successive Conference|
|Brighton||Bulldogs||Brighton||Orange and Black||1973||Independent||1979||Kensington Valley Conference|
|Dundee||Vikings||Dundee||Blue and White||1965||Huron League||1972||Michigan-Ohio Border Conference|
|Milan||Big Reds||Milan||Red and Black||1967||Huron League||2000||Huron League|
|Novi||Wildcats||Novi||Green and White||1970||Independent||1979||Kensington Valley Conference|
|Pinckney||Pirates||Putnam Township||Red and Black||1984||Kensington Valley Conference||2000||Kensington Valley Conference|
|South Lyon||Lions||South Lyon||Blue and Gold||1964||Independent||1979||Kensington Valley Conference|
The SEC was formed by three schools from the disbanding Washtenaw County League (Chelsea, Dexter, and Saline), two from the Huron League (Dundee and Ypsilanti Lincoln), and independent South Lyon. The league expanded to eight by 1969, with Novi joining from the Lakeland Conference that year, and Milan joining from the Huron in 1967. In 1973 Dundee left for the Michigan-Ohio Border Conference, and was replaced by Brighton, joining from the Wayne-Oakland League. 1979 also brought major change to the conference, as Brighton, Novi, and South Lyon left for the Kensington Valley Conference. 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. Western returned to the Cascades Conference in 1983, as their replacement, Pinckney, left the Kensington Valley Conference in 1984.
The league was stable until 2000, when Milan and Pinckney left for the Huron League and Kensington Valley Conference, respectively. Temperance Bedford joined from the Great Lakes League, and were joined by two schools that had been independent since the South Central Conference folded in 1996 (Adrian and Ann Arbor Pioneer). The conference now split into Red and White divisions: Adrian, Bedford, Pioneer, and Saline made up the Red, and the White consisted of Chelsea, Dexter, Lincoln, and Tecumseh. The Southeastern scrapped the divisional format in 2006 in anticipation of another former South Central school joining that next year, Ann Arbor Huron. The conference reintroduced divisions in 2009, the Red being formed by Bedford, Huron, Pioneer, Saline, and two new members, new school Ann Arbor Skyline and Monroe, who left the Michigan Mega Conference. The White Division consisted of Adrian, Chelsea, Dexter, Lincoln, Tecumseh, and another school leaving the Michigan Mega, Ypsilanti.
Ypsilanti had changed their name from Braves to Phoenix in 2010, after phasing out Native American mascots since the 1990s. The school district consolidated with Ypsilanti Willow Run in 2013, resulting in not only another mascot change (Grizzlies), but a color change from Purple and Gold to Black and Gold. Pinckney rejoined the conference in 2017. Jackson will join the sec in 2018.