Select School Beginning with "A"
| School | League | County |
|---|---|---|
| Ada | Northwest Conference | Hardin |
| Adena | Scioto Valley Conference | Ross |
| Aiken | Southwest Ohio Public League | Hamilton |
| Akron Early College | Summit | |
| Alexander | Tri-Valley Conference | Athens |
| Allen East | Northwest Conference | Allen |
| Alliance | Northeastern Buckeye Conference | Stark |
| Amanda-Clearcreek | Mid-State League | Fairfield |
| Amelia | Fort Ancient Valley Conference | Clermont |
| Anderson | Fort Ancient Valley Conference | Hamilton |
| Anna | Shelby County Athletic League | Shelby |
| Ansonia | Cross County Conference | Darke |
| Anthony Wayne | Northern Lakes League | Lucas |
| Antwerp Local | Green Meadows Conference | Paulding |
| Arcadia | Blanchard Valley Conference | Hancock |
| Arcanum | Cross County Conference | Darke |
| Archbishop Alter | Greater Catholic League | Montgomery |
| Archbishop Hoban | North Coast League | Summit |
| Archbold | Northwest Ohio Athletic League | Fulton |
| Arlington | Blanchard Valley Conference | Hancock |
| Ashland | Ohio Cardinal Conference | Ashland |
| Athens | Tri-Valley Conference | Athens |
| Aurora | Chagrin Valley Conference | Portage |
| Avon | West Shore Conference | Lorain |
| Avon Lake | Southwestern Conference | Lorain |
| Ayersville | Green Meadows Conference | Defiance |