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| Alter High School | C | 1 | | | Kettering, Oh | OH | |
| Centerville High School | C | 2 | | Western Ohio Regional Tournament | Centerville City Schools | OH | |
| International Academy East | C | 2 | | Oakland County - MI Region 6 | Troy School District | MI | |
| Lincolnview High School | C | 1 | | BGSU Northwest Ohio Regional | Lincolnview Local Schools | OH | |
| Loveland High School | C | 1 | | Southwestern Ohio Science Olympiad | Loveland City Schools | OH | |
| Mars Hill Academy | C | 1 | 1 | | Mason City Schools | OH |
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| Mayfield High School | C | 2 | | Northeast & Northern Ohio Regional Tournament | Mayfield City Schools | OH | |
| Pickerington High School Central | C | 2 | | Central Ohio Regional Tournament | Pickerington Local School District | OH | |
| Piqua High School | C | 1 | | Western Ohio Regional Tournament | Piqua City Schools | OH | |
| Princeton HS | C | 1 | 1 | New Jersey Science Olympiad | Princeton Public Schools | NJ |
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| Ranney School (HS) | C | 1 | 1 | | Private | NJ | |
| Richardson Highschool | C | 1 | | | Richardson Independant School District | TX | |
| Shawnee High School | C | 2 | 2 | BGSU Northwest Ohio Regional | Shawnee Local Schools | OH | |
| Springfield High School | C | 2 | | BGSU Northwest Ohio Regional | Springfield Local Schools (Lucas County) | OH | |
| St. Henry District High School | C | 1 | 1 | Maysville Regional | Diocese of Covington | KY | |
| The Seven Hills School | C | 1 | 1 | Southwestern Ohio Science Olympiad | Cincinnati Public (but it's a private school) | OH | |
| UC TEST 1 | C | 1 | | | UC | OH | |
| Vernon Hills High School | C | 1 | | Illinois Regional | Community High School District 128 | IL | |
| Warren High School | C | 1 | 1 | Southeastern | Warren Local Schools | OH | |
| Wilcox High School | C | 1 | 1 | Santa Clara County Regional Science Olympiad | Santa Clara Unified School District | CA | |
| Wyoming High school | C | 1 | 1 | Southwestern Ohio Science Olympiad | Wyoming City Schools | OH | |