There were numerous conferences within the IHSAA that were made up of schools based entirely in one county. Many of these "County Conferences" also contained schools from neighboring counties that were either geographically closer or smaller than the other schools in their home county. These conferences would fold when schools would consolidate and seek out other, more expansive conferences that included similar-sized schools. The starting date of many of these conferences is hard to confirm, so the listing for many of these leagues uses the earliest date that can be confirmed.
This conference predates the end of World War II, and most of its members shared membership with the Eastern Indiana Conference (EIC). The last non-EIC member closed in 1956, and this county league folded the next year.
This league was a rare arrangement where all of the non-city schools from two counties played in the same conference. Bartholomew County had only two rural schools in the far north of the county (Clifford and Hope), and were able to participate with their peers within Shelby County. Once Hauser left in 1961, the league became the Shelby County League for three season, until the three remaining schools rejoined thm in the Mid-Hoosier Conference.
The conference was founded in 1911, and stayed largely intact until the 1950s.
The conference began in 1920, and folded in 1964, as only two schools remained.
All schools were located in Cass County, Indiana. The conference formed in 1922 and folded in 1963.
All schools were located in Decatur County. Conference folded in 1968 as all schools consolidated into either North Decatur or South Decatur high schools.
All schools were located in Delaware County. The conference is one of the oldest confirmed, having competed since at least 1931, if not earlier. The conference folded in 1968 as the remaining five schools in the league consolidated into two.