The conference responded by going outside county borders by admitting Norwell (itself a newly consolidated school) in 1967, followed by Adams Central, Churubusco, and Eastside in 1968.

The conference went to a two division format in 1971 with the addition of new school Homestead and Southern Wells.

They were replaced by NEIAC schools Bluffton and South Adams.

Garrett, becoming too large for the Northeast Corner, moved to the Allen County league in 2005.

Jay County joined the conference beginning with the 2014-15 school year.