| High School Name | CEEB Code | City | County |
| Ashland Academy Of Learning | 360207 | Ashland | Ashland |
| Ashland County Community Acad | 365777 | Ashland | Ashland |
| Ashland County-W Holmes Career | 360219 | Ashland | Ashland |
| Ashland High School | 360210 | Ashland | Ashland |
| Black River High School | 364885 | Sullivan | Ashland |
| Buckeye Central High School | 363790 | New Washington | Crawford |
| Bucyrus High School | 360635 | Bucyrus | Crawford |
| Centerburg High School | 360845 | Centerburg | Knox |
| Clear Fork High School | 360415 | Bellville | Richland |
| Colonel Crawford High School | 363865 | North Robinson | Crawford |
| Crestline High School | 361725 | Crestline | Crawford |
| Crestview High School | 360208 | Ashland | Ashland |
| Danville High School | 361790 | Danville | Knox |
| ECOT – Electronic Classroom of Tomorrow | 361537 | Columbus | Franklin |
| Edison High School | 363425 | Milan | Erie |
| Ehove Career Center | 363427 | Milan | Erie |
| Fredericktown High School | 362210 | Fredericktown | Knox |
| Galion High School | 362240 | Galion | Crawford |
| Genesis Christian Academy | 010711 | Ashland | Ashland |
| Goal Digital Academy | 365252 | Ontario | Richland |
| Hillsdale High School | 362740 | Jeromesville | Ashland |
| Hope Vly Region Mansfld Branch | 363163 | Mansfield | Richland |
| Knox County Career Center | 363562 | Mount Vernon | Knox |
| Lexington High School | 362955 | Lexington | Richland |
| Loudonville High School | 363070 | Loudonville | Ashland |
| Lucas High School | 363105 | Lucas | Richland |
| Madison Comprehensive HS | 363165 | Mansfield | Richland |
| Mansfield Christian School | 363166 | Mansfield | Richland |
| Mansfield City Sch Alter Sch | 363164 | Mansfield | Richland |
| Mansfield Enhancement Academy | 364147 | Mansfield | Richland |
| Mansfield Senior High School | 363168 | Mansfield | Richland |
| Mapleton High School | 360213 | Ashland | Ashland |
| Marion Harding High School | 363225 | Marion | Marion |
| Monroeville High School | 363500 | Monroeville | Huron |
| Mount Gilead High School | 363530 | Mount Gilead | Morrow |
| Mount Vernon High School | 363565 | Mount Vernon | Knox |
| New London High School | 363715 | New London | Huron |
| Northmor Local High School | 362238 | Galion | Morrow |
| Northwestern High School | 365495 | West Salem | Wayne |
| Norwalk High School | 363875 | Norwalk | Huron |
| Norwayne High School | 361735 | Creston | Wayne |
| Ohio Connections Academy | 365769 | Mason | Warren |
| Ohio Virtual Academy | 365143 | Maumee | Lucas |
| Ontario High School | 363945 | Ontario | Richland |
| Orrville High School | 363950 | Orrville | Wayne |
| Pioneer Career & Tech Center | 364653 | Shelby | Richland |
| Plymouth High School | 364230 | Plymouth | Richland |
| Saint Peters High School | 363170 | Mansfield | Richland |
| Sandusky High School | 364570 | Sandusky | Erie |
| Seneca East High School | 360255 | Attica | Seneca |
| Shelby Senior High School | 364655 | Shelby | Richland |
| South Central High School | 362435 | Greenwich | Huron |
| Tabernacle Praise Christian School | 362242 | Crestline | Crawford |
| Temple Christian School | 363175 | Mansfield | Richland |
| Townsend Community School | 365273 | Castalia | Erie |
| Treca Digital Academy | 363246 | Marion | Marion |
| Upper Sandusky High School | 365160 | Upper Sandusky | Wyandot |
| Utica High School | 365190 | Utica | Licking |
| Wayne County Sch Career Ctr | 364698 | Smithville | Wayne |
| Wayside Christian School | 360644 | Bucyrus | Crawford |
| West Holmes High School | 363450 | Millersburg | Holmes |
| Willard High School | 365545 | Willard | Huron |
| Wooster High School | 365630 | Wooster | Wayne |
| Wynford High School | 360645 | Bucyrus | Crawford |
