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| American Heritage School | C | 4 | 4 | Southern Regional at University of Miami | Palm Beach | FL | |
| BASIS Cedar Park HS | C | 5 | 5 | TX | BASIS Charter School District | TX | |
| BASIS Independent Fremont | C | 1 | | Alameda Regional Science Olympiad | Fremont USD | CA | |
| Crean Lutheran High School | C | 1 | | | Irvine | CA | |
| Division Avenue High School | C | 4 | | Nassau East Regional | Levittown Public Schools | NY |
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| Flintridge Sacred Heart Academy | C | 1 | 1 | SoCal Joint Regional | Independent | CA | |
| Foothill High School | C | 2 | | Alameda Regional Science Olympiad | Pleasanton USD | CA |
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| Fort Mill High School | C | 2 | 2 | | Fort Mill High School | SC | |
| Fremont High School | C | 2 | 2 | Santa Clara County Regional Science Olympiad | Fremont Union High School District | CA | |
| Jericho High School | C | 3 | 3 | Nassau East | Jericho Union Free School District | NY | |
| Joel Barlow High School | C | 4 | 4 | | er9 Redding Easton | CT |
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| John Jay Senior High School (East Fishkill) | C | 3 | 4 | New York - Mid-Hudson Region | Wappingers Central School District | NY |
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| Marquette University HS | C | 1 | 1 | Southeast WI | Private | WI |
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| Northern Academy | C | 1 | 1 | Mid Hudson | Private | NY | |
| Olympia High School | C | 8 | | Central Regional at Osceola High School | Orange County Public Schools | FL | |
| Paul D. Schreiber High School | C | 3 | | Nassau West | Port Washington UFSD | NY | |
| Plattsburgh High School | C | 4 | 4 | Adirondack | Plattsburgh High School | NY |
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| Pleasantville High School | C | 3 | | | Pleasantville Union Free School District | NY | |
| Saint Francis High School | C | 3 | 3 | Santa Clara County Regional Science Olympiad | Diocese of San Jose | CA |
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| San Francisco High School of the Arts | C | 1 | 1 | Bay Area Regional Science Olympiad | San Francisco | CA | |
| Saugerties High School | C | 1 | | | Saugerties Central School | NY | |
| Shaker High School | C | 5 | 5 | | North Colonie Central Schools | NY | |
| South Broward High School | C | 1 | 1 | Southern Regional at University of Miami | Broward Schools | FL | |
| South Windsor High School | C | 4 | 8 | | South Windsor High School | CT |
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| Spackenkill High School | C | 3 | 3 | | Spackenkill | NY | |
| Sunset High School | C | 1 | 1 | Oregon Science Olympiad | Beaverton School District | OR | |
| Valley Stream Central High School | C | 2 | 2 | Nassau West | Valley Stream Central High School District | NY |
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| Ward Melville High School | C | 2 | 2 | Eastern Long Island Regional | Three Village Central School District | NY | |
| Westside High School | C | 2 | 2 | | Houston Independent School District | TX |
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| Westview High School | C | 1 | 1 | Oregon Science Olympiad | Beaverton School District | OR | |
| Wichita East High School | C | 3 | 3 | | USD 259 | KS | |
| Woodward Academy | C | 4 | 4 | Regional Placeholder | Private | GA | |