The Tri-County Conference was a league that ran from 1950 to 1965, and is considered a direct forerunner to the Mid-Indiana Conference. The league began in 1950 as the Howard-Miami Conference, as the three schools left from the post-consolidation Howard County Conference joined with three schools from Miami County. The conference changed its name to the TCC when Swayzee and Sweetser, from Grant County joined. When school consolidation forced the conference to look outside its footprint to find similar-sized schools, in 1965 it became the current MIC.

This should not be confused with conferences of the same name based in the southern and western portions of the state.

Former members

SchoolLocationMascotColors# / CountyYear joinedPrevious conferenceYear leftConference joined
Bunker HillBunker HillMinutemen52 Miami1950Miami County1963none (consolidated into Maconaquah)
Clay TownshipLoreeIndians52 Miami1950Miami County1963none (consolidated into Maconaquah)
ConverseConverseBordermen52 Miami1950Miami County1957none (consolidated into Oak Hill)
Eastern (Greentown)*GreentownComets34 Howard1950new school1965Mid-Indiana
NorthwesternKokomoTigers34 Howard1950Howard County1965Mid-Indiana
WesternRussiavillePanthers34 Howard1950Howard County1958Hoosier
SwayzeeSwayzeeSpeed Kings27 Grant1955Grant County1957none (consolidated into Oak Hill)
SweetserSweetserBraves27 Grant1955Grant County1965none (consolidated into Oak Hill)
Oak HillConverseGolden Eagles27 Grant1957none (new school)1965Mid-Indiana
MaconaquahBunker HillBraves52 Miami1963none (new school)1965Mid-Indiana