| Name |
County |
| Montessori Academy of Cincinnati |
Warren |
| Montessori Children's School |
Cuyahoga |
| Montessori School of Bowling Green |
Wood |
| Montessori School of Dayton |
Montgomery |
| Montessori School of Wooster |
Wayne |
| Montgomery County Educational Service Center |
Montgomery |
| Moreland Hills Elementary School |
Cuyahoga |
| Mosdos Ohr Hatorah |
Cuyahoga |
| Mosdos Ohr Hatorah - Girls Division |
Cuyahoga |
| Most Blessed Sacrament School |
Lucas |
| Mother Brunner Catholic School |
Montgomery |
| Mound School |
Cuyahoga |
| Mount Auburn Preparatory Academy |
Hamilton |
| Mount Healthy Junior / Senior High School |
Hamilton |
| Mount Healthy Preparatory and Fitness Academy |
Hamilton |
| Mount Logan Educational Center |
Ross |
| Mount Vernon Seventh Day Adventist Elementary School |
Knox |
| Napoleon Junior / Senior High School |
Henry |
| Nathan Hale School |
Cuyahoga |
| Nativity School |
Hamilton |
| Navarre Elementary School |
Lucas |
| New Day Academy |
Cuyahoga |
| New Hope Christian Academy |
Pickaway |
| New Knoxville School |
Auglaize |
| New London Elementary School |
Huron |
| New Miami Middle / High School |
Butler |
| Newark Digital Academy |
Licking |
| Newark Seventh - Day Adventist School |
Licking |
| Newton High School |
Miami |
| Nicholas School |
Miami |
| Nightingale Montessori School |
Clark |
| Niles Intermediate School |
Trumbull |
| Noble Academy |
Franklin |
| Noble Academy Cleveland |
Cuyahoga |
| Nord Middle School |
Lorain |
| North Akron Catholic School |
Summit |
| North Baltimore Middle / High School |
Wood |
| North Dayton School of Discovery |
Montgomery |
| North Road Elementary School |
Trumbull |
| Northern Career Institute of Willoughby |
Lake |
| Northland Preparatory and Fitness Academy |
Franklin |
| Northside Christian School |
Delaware |
| Northside Preparatory Academy |
Hamilton |
| Northview Primary School |
Hancock |
| Northwest Academy |
Cuyahoga |
| Northwest Primary School |
Stark |
| Northwestern Junior - Senior High School |
Clark |
| Northwood Intermediate School |
Shelby |
| Northwood Schools |
Wood |
| Norton Primary School |
Summit |
| Norwood Preschool |
Hamilton |
| Notre Dame Academy |
Lucas |
| Oakdale Elementary School |
Wood |
| Oakstone Academy Middle / High School |
Franklin |
| Oakstone Community School |
Franklin |
| Ohio School for the Deaf |
Franklin |
| Ohio State School For The Blind |
Franklin |
| Ohio Valley Christian School |
Gallia |
| Ohio Valley Voices School |
Clermont |
| Ohio Virtual Academy |
Lucas |
| Old Orchard Elementary School |
Lucas |
| Old Trail School |
Summit |
| Old West End Academy |
Lucas |
| Olde Orchard Alternative Elementary School |
Franklin |
| Olmsted Falls Early Childhood Center |
Cuyahoga |
| One School |
Franklin |
| Open Door Christian School |
Lorain |
| Operation Rebirth Christian Academy |
Champaign |
| Orchard Hill Intermediate School |
Stark |
| Orchard S T E M Elementary School |
Cuyahoga |
| Orion Academy |
Hamilton |
| Ottawa Hills Elementary School |
Lucas |
| Ottawa Hills Junior / Senior High School |
Lucas |
| Ottawa River Elementary School |
Lucas |
| Ottoville Middle High School |
Putnam |
