ONN I-L
- Independence (Independence)
- Independence (Columbus)
- Indian Creek
- Indian Hill
- Indian Lake
- Indian Valley
- Ironton
- Jackson-Milton
- Jackson
- Jackson Center
- Jackson (Massillon)
- John Adams
- John F Kennedy (Cleveland)
- John F Kennedy (Warren)
- John Glenn
- John Marshall
- Johnstown-Monroe
- Jonathan Alder
- Kenmore
- Kenston
- Kenton
- Kenton Ridge
- Kettering Fairmont
- Keystone
- Kings
- Kirtland
- Labrae
- Lake Catholic
- Lake (Millbury)
- Lake (Uniontown)
- Lakeside
- Lakeview
- Lakewood
- Lakewood (Hebron)
- Lakota
- Lakota East
- Lakota West
- Lancaster
- La Salle
- Laurel
- Lebanon
- Ledgemont
- Leetonia
- Lehman Catholic
- Leipsic
- Lexington
- Libbey
- Liberty
- Liberty Center
- Liberty Union
- Liberty-Benton
- Licking Heights
- Licking Valley
- Lima Central Catholic
- Lima Senior
- Lincoln
- Lincoln West
- Lincolnview
- Linden Mc Kinley
- Lockland
- Logan
- Logan Elm
- London
- Lordstown
- Loudonville
- Louisville
- Loveland
- Lowellville
- Lucas
- Lutheran East
- Lutheran West
- Lynchburg-Clay