The Mid-Hoosier Conference is a seven-member IHSAA-sanctioned athletic association located within Bartholomew, Decatur, Johnson, and Shelby Counties in Central Indiana.
The conference was formed in 1964 by seven schools from Bartholomew (Hauser), Brown (Brown County), and Shelby (Southwestern, Triton Central, Waldron) counties as a conference for smaller schools south of Indianapolis.
The conference had some roster changes in its early years, as Whiteland outgrew the MHC and moved to the Mid-State, while Indian Creek and South Decatur joined as newly consolidated schools.
The league would stay stable until the late 1990s, as Triton Central rejoined from the Rangeline Conference, bringing membership to 10.
The MHC would respond by bringing in two former White River Conference schools, Eastern Hancock and Knightstown.