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Columbus City School District
- Indianola Informal K-8 School Calendar
- Ridgeview Middle School Calendar
- Siebert Elementary School Calendar
- Georgian Heights Alt Elementary School @ Old Wedge Calendar
- Oakmont Elementary School Calendar
- Woodward Park Middle School Calendar
- Binns Elementary School Calendar
- Woodcrest Elementary School Calendar
- Valleyview Elementary School Calendar
- Lindbergh Elementary School Calendar
- Indian Springs Elementary School Calendar
- Alpine Elementary School Calendar
- Columbus City Preparatory School For Girls Calendar
- Northgate Intermediate Calendar
- Clinton Elementary School Calendar
- Columbus Spanish Immersion K-8 School Calendar
- Berwick Alternative K-8 School Calendar
- South Mifflin Stem Academy (K-6) Calendar
- Cassady Alternative Elementary School Calendar
- Parkmoor Elementary School Calendar
- Centennial High School Calendar
- Columbus Alternative High School Calendar
- Sherwood Middle School Calendar
- Easthaven Elementary School Calendar
- Dominion Middle School Calendar
Other districts in Ohio state
- Copley-Fairlawn City School District
- Cornerstone Academy Community
- Cory-Rawson Local School District
- Coshocton Opportunity School
- Coventry Local School District
- Crestview Local School District
- Crestwood Local School District
- Covington Exempted Village School District
- Cuyahoga Heights Local School District
- Cuyahoga Falls City School District
- Cleveland Metropolitan School District
- Cleveland Academy For Scholarship Technology And Leadership
- Clear Fork Valley Local School District
- Cleveland Arts And Social Sciences Academy
- Clearview Local School District
- Cleveland College Preparatory School
- Claymont City School District
- Cliff Park High School School District
- Clinton-Massie Local School District
- College Corner Local
- Colonel Crawford Local School District
- Cloverleaf Local School District
- Cleveland Heights-University Heights City
- Cincinnati Public Schools
- Clyde-Green Springs Exempted Village School District
- Coldwater Exempted Village School District
- Columbus Arts & Technology Academy
- Columbiana Exempted Village School District
- Columbus Humanities Arts And Technology Academy
- Columbus Preparatory Academy
- Carlisle Local School District
- Center For Student Achievement
- Cedar Cliff Local School District
- Centerburg Local
- Central Local School District
- Centerville City
- Chagrin Falls Exempted Village School District
- Central High School School District
- Champion Local School District
- Charles School At Ohio Dominican University
- Canton City School District
- Cincinnati Achievement Academy
- Chesapeake Union Exempted Village School District
- Chardon Local School District
- Chippewa Local School District
- Cincinnati College Preparatory Academy
- Chillicothe City School District
- Celina City School District
- Cincinnati Technology Academy School District
- City Day Community School
- Canton College Preparatory School School District
- Campbell City
- Caldwell Exempted Village School District
- Canal Winchester Local School District
- Canton Harbor High School School District
- Canton Local School District
- Capital High School
- Carey Exempted Village School District
- Cardington-Lincoln Local School District