ONN Q-T
- Ravenna
- Reading
- Reynoldsburg
- Revere
- Rhodes
- Richmond Heights
- Ridgedale
- Ridgemont
- Ridgewood
- Rittman
- River
- River Valley (Caledonia)
- River Valley (Cheshire)
- River View
- Riverdale
- Riverside (De Graff)
- Riverside (Painesville)
- Rock Hill
- Rocky River
- Roger Bacon
- Rogers
- Roosevelt
- Rootstown
- Ross
- Rossford
- Salem
- Sandy Valley
- Sandusky
- Sandy Valley
- Sciotoville Community
- Scott
- Seneca East
- Shadyside
- Shaker Heights
- Shaw
- Shawnee (Lima)
- Shawnee (Springfield)
- Shelby
- Shenandoah
- Sheridan
- Shroder
- Sidney
- Smithville
- Solon
- South Central
- South (Cleveland)
- South
- South Gallia
- South Point
- South Range
- South (Springfield)
- South (Willoughby)
- Southeast
- Southeastern
- Southeastern Local
- Southern (Racine)
- Southern (Salineville)
- Southview
- Spencerville
- Springfield (Akron)
- Springboro
- Springfield (Springfield)
- Springfield (Holland)
- Springfield (New Middleton)
- St Charles
- St Clairsville
- St Edward
- St Francis De Sales (Columbus)
- St Francis De Sales (Toledo)
- St Henry
- St Ignatius
- St John Central
- St Johns Jesuit
- St Johns
- St Joseph Central
- St Mary Central Catholic
- St Paul
- St Peter Chanel
- St Thomas Aquinas
- St Vincent-St Mary
- St Wendelin
- St Xavier
- Start
- Stebbins
- Steele
- Steubenville
- Stow-Munroe Falls
- Strasburg-Franklin
- Streetsboro
- Strongsville
- Struthers
- Sts John and Paul
- Summit Country Day
- Swanton
- Sycamore
- Sylvania Northview
- Symmes Valley
- Taft
- Talawanda
- Tallmadge
- Taylor
- Teays Valley
- Tecumseh
- Thomas Worthington
- Timken
- Tinora
- Tippecanoe
- Toledo Christian
- Toronto
- Tri-County North
- Tri-Valley
- Triad
- Trimble
- Trinity
- Triway
- Trotwood-Madison
- Troy
- Troy Christian
- Turpin
- Tuscarawas Valley
- Tuscarawas Central Catholic
- Tuslaw
- Twin Valley South
- Twinsburg