[5] All 3 schools gradually joined the league with their sports, starting with track, wrestling, swimming, golf, soccer and tennis in 2010-11; basketball, baseball, softball and volleyball in 2011-12, and football in 2012.

The Scarlet Division (big schools) would consist of Cambridge, Dover, Marietta, New Philadelphia and Zanesville.

The Gray Division (small schools) would consist of Claymont, Coshocton, Meadowbrook, River View, and Rosecrans.

In 2018, it was officially announced that Coshocton, Meadowbrook, and River View would leave the ECOL to join the Muskingum Valley League (MVL) beginning with the 2020 season.

Cambridge left in 2021 for the Buckeye 8,[8] and New Philadelphia announced they would be leaving to join the Ohio Cardinal Conference starting in 2022.