It has won nine consecutive all-sports trophies, the award given to the school with the greatest success in all conference athletic competitions.

Mansfield Senior has been the champion or co-champion in boys' basketball in 9 of 11 league seasons, Wooster has won all eleven boys' swimming and nine girls' swimming titles, Ashland had four running girls' soccer championships, and Mount Vernon has won every conference softball title since joining in 2016.

In April 2020, the OCC announced that New Philadelphia would join as their eighth member beginning in the 2022-23 school year.

The OCC agreed to let New Philadelphia continue to play their Week 10 football rivalry with Dover, which is currently the third-oldest in Ohio.

[11] In December 2022, Mount Vernon announced that they would leave the OCC after the 2023-2024 school year to join the Licking County League.

This table only includes state championships won by schools while a member of the Ohio Cardinal Conference: Boys' Tennis Girls' Cross Country Boys' Cross Country 2004, 2013 2015, 2017, 2018, 2019, 2020 2015, 2017 See also Ohio High School Athletic Conferences