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| Canton High School | C | 1 | 1 | | Canton, CT | CT | |
| Chariho High School | C | 1 | | Rhode Island Science Olympiad | Chariho Regional School District | RI | |
| Columbia High School | C | 1 | | | East Greenbush | NY | |
| Connecticut IB Academy | C | 1 | | | EHPS | CT | |
| Cumberland High School | C | 2 | | Rhode Island Science Olympiad | Cumberland School District | RI | |
| Division Avenue High School | C | 1 | | Nassau East Regional | Levittown Public Schools | NY |
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| Farmington High School | C | 2 | | MI Regional 06 | Farmington Public Schools | CT | |
| General Douglas MacArthur High School | C | 1 | | NY | Levittown Public Schools | NY | |
| Glastonbury High School | C | 2 | 2 | CT Regional 1 | Glastonbury | CT | |
| Hampden Charter School of Science - High School | C | 1 | | Worcester (Western MA) | Hampden Charter | MA | |
| Hopkins School | C | 1 | | | Hopkins School | CT | |
| Joel Barlow High School | C | 2 | | er9 | Region 9 | CT | |
| John Jay Senior High School (East Fishkill) | C | 2 | | New York - Mid-Hudson Region | Wappingers Central School District | NY |
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| Miss Porter's School | C | 1 | 1 | | Private | CT | |
| Mount Hope High School | C | 2 | 2 | Rhode Island Science Olympiad | Bristol Warren Regional School District | RI | |
| Niskayuna High School | C | 1 | | NY | Niskayuna Central School District | NY | |
| Northern Academy | C | 2 | | Mid Hudson | Private | NY | |
| Old Saybrook Senior High School | C | 1 | 1 | | Old Saybrook | CT | |
| Pilgrim High School | C | 1 | | Rhode Island Science Olympiad | Warwick Public Schools | RI | |
| Saugerties High School | C | 1 | | | Saugerties central school district | NY | |
| South Windsor High School | C | 2 | 2 | | South Windsor High School | CT |
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| Spackenkill High School | C | 2 | | | Spackenkill | NY | |
| The Bronx High School of Science | C | 2 | | NY City North | New York City | NY |
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| Uxbridge High School | C | 2 | | Worcester (Western MA) | Uxbridge Public Schools | MA |
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| Valley Stream Central High School | C | 1 | | Nassau West | Valley Stream Central High School District | NY |
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| Weston High School | C | 1 | | | Weston | CT | |
| Wilton High School | C | 2 | 2 | | Wilton Public Schools | CT | |