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| 'Iolani School | B | 2 | 2 | | Leeward Regional | HI |
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| A. C. Crews Middle School | B | 5 | 5 | Regional Placeholder | Gwinnett County Public Schools | GA |
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| Alabama School of Fine Arts | B | 2 | 2 | | Alabama School of Fine Arts | AL |
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| Albany Middle School | B | 3 | 3 | Alameda Regional Science Olympiad | Albany USD | CA |
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| Alston Ridge Middle School | B | 1 | 1 | Raleigh Regional | Wake County Public School System | NC |
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| American High School | C | 3 | 3 | Alameda Regional Science Olympiad | Fremont Unified School District | CA |
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| Arcadia High School | C | 2 | 2 | Rio Hondo | Arcadia Unified School District | CA |
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| BASIS Cedar Park | B | 4 | 4 | Texas UT Austin | Charter | TX |
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| BASIS Cedar Park HS | C | 3 | 3 | TX | BASIS Charter School District | TX | |
| BASIS Independent Fremont | C | 3 | 3 | Alameda Regional Science Olympiad | Fremont USD | CA | |
| BASIS Independent Fremont (MS) | B | 3 | 3 | Alameda Regional Science Olympiad | Fremont USD | CA | |
| BASIS Independent McLean | B | 3 | 3 | Mary Washington (2/28) | Independent | VA | |
| Basis Pflugerville | B | 4 | 4 | n/a | Charter | TX | |
| Blue Valley Northwest High School | C | 2 | 2 | | Blue Valley School District | KS | |
| Bridgeland High School | C | 4 | 4 | University of Texas Regional | Cypress-Fairbanks ISD | TX |
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| Brookwood High School | C | 5 | 5 | Regional Placeholder | Gwinnett County Public Schools | GA | |
| Burleigh Manor Middle School | B | 6 | 6 | MSO Regional Div B East/West | Howard County Public Schools | MD | |
| Canyon MS (Bay Area) | B | 3 | 3 | Alameda Regional Science Olympiad | Castro Valley USD | CA | |
| Cedarlane Academy | B | 1 | 1 | SoCal | Hacienda La Puente | CA | |
| Clarksville Middle School | B | 6 | | | Howard County Public Schools | MD | |
| Davidson Academy | B | 3 | 3 | Nevada Science Olympiad | Davidson Academy | NV | |
| Davidson Academy | C | 1 | 1 | Nevada Science Olympiad | Da | NV | |
| Discovery Peak Charter School | B | 1 | 1 | Alaska Science Olympiad | Fairbanks North Star Borough School District | AK | |
| East Helena High School | C | 1 | 1 | Montana Science Olympiad | East Helena Public Schools - School District 9 | MT | |
| Eastlake High School | C | 5 | 5 | Regional - NW (Division C) | Lake Washington School District | WA |
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| Estrella Mountain Elementary | B | 2 | 2 | Div B: North Central | Liberty Elementary | AZ | |
| Evergreen Middle School | B | 2 | 2 | Regional - NW-B-East | Lake Washington School District | WA |
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| Fairview Middle School | B | 3 | 3 | Northern Regional at The University of Florida | Leon County | FL |
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| Fountain Valley High School | C | 1 | 1 | SoCal Joint Regional | Huntington Beach Union High School District | CA | |
| Gateway Middle School | B | 1 | 1 | Regional - NW-B-Seattle | Everett School District | WA | |
| Glen A. Wilson High School | C | 2 | 2 | SoCal Joint Regional | Hacienda La Puente Unified | CA | |
| Hamilton International Middle School | B | 2 | 2 | Regional - NW-B-Seattle | Seattle Public School District | WA | |
| Highlands Intermediate School | B | 3 | 3 | | Hawaii DOE Leeward District | HI | |
| Homestead | C | 1 | 1 | Santa Clara County Regional Science Olympiad | Fremont Union High School District | CA |
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| Ingersoll Middle School | B | 1 | 1 | | Canton Union School District #66 | IL | |
| Iolani School | C | 4 | 4 | 2023 HSSO Leeward Regional | Oahu | HI | |
| Irvine High School | C | 2 | 2 | SoCal Joint Regional | Irvine Unified School District | CA |
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| James Campbell High School | C | 1 | 1 | 2022 HSSO Leeward Regional | Hawaii | HI | |
| Jeffrey Trail Middle School | B | 4 | 4 | Orange County Regional | Irvine Unified School District | CA | |
| John Read Middle School | B | 2 | 2 | ER9 | Redding | CT |
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| Kaiser High School | C | 2 | 2 | | Honolulu | HI | |
| Kealing Middle School | B | 6 | 6 | UT Austin | Austin ISD | TX | |
| Khan Lab School | B | 2 | 2 | Santa Clara County Regional Science Olympiad | Khan Lab School | CA | |
| Kirtland Middle School | B | 2 | 2 | North West New Mexico Regionals | Central Consolidated Schools | NM | |
| Kraemer Middle School | B | 4 | 4 | Orange County Regional | Placentia Yorba Linda Unified | CA |
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| Lakeside Middle School | B | 1 | 1 | SoCal Joint Regional | Irvine Unified School District | CA |
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| Lambert High School | C | 2 | 2 | Regional Placeholder | Forsyth County | GA |
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| Leota Middle School | B | 3 | 3 | Regional - NW-B-Seattle | Northshore School District | WA |
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| Liberal Arts and Science Academy | C | 3 | 3 | | Austin Independent School District | TX |
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| Lime Kiln Middle School | B | 4 | 4 | MSO Regional Div B East/West | Howard County Public Schools | MD | |
| Los Altos High School | C | 5 | 5 | Santa Clara County Regional Science Olympiad | Mountain View Los Altos | CA |
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| Marquette University HS | C | 1 | 1 | Southeast WI | Private | WI |
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| McNeil High IB World School | C | 2 | 2 | Texas | Round Rock ISD | TX | |
| Memphis School of Excellence | B | 1 | 1 | | Shelby County schools | TN | |
| Monta Vista High School | C | 1 | 1 | Santa Clara County Regional Science Olympiad | Fremont Union High School District | CA |
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| Moorestown Friends School | C | 2 | 2 | | Independent School | NJ |
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| Mount View Middle School | B | 3 | 3 | MSO Regional Div B East/West | Howard County Public Schools | MD | |
| Munster HS | C | 2 | 2 | Purdue University Northwest Regional | School Town of Munster | IN | |
| Northern Academy | C | 2 | 2 | Mid Hudson | Private | NY | |
| Oak Valley Middle School | B | 1 | 1 | SDSO | Poway Unified School District | CA |
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| Odle Middle School | B | 1 | 1 | Regional - NW-B-East | Bellevue School District | WA | |
| Orlando Science Middle School | B | 8 | 8 | Central Regional at Osceola High School | Orange | FL |
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| Pearl City High School | C | 3 | 3 | 2022 HSSO Leeward Regional | Leeward District | HI | |
| Pearson Ranch Middle School | B | 3 | 3 | Texas | Round Rock ISD | TX | |
| Pleasant Ridge MS | B | 4 | 4 | | Blue Valley SD | KS | |
| Princeton International School for Mathematics and Science | C | 3 | 3 | | Private | NJ | |
| Punahou School | B | 4 | 4 | | HAIS | HI | |
| Punahou School | C | 3 | 3 | | HAIS | HI | |
| Questa | B | 1 | 1 | San Joaquin County | Lammersville USD | CA |
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| Ramsay High School | C | 1 | 1 | C Division - Auburn University State Tournament | Birmingham City Schools | AL | |
| Rancho San Joaquin Middle School | B | 2 | 2 | Orange | Irvine Unified | CA | |
| Riverside STEM High School | C | 2 | 2 | Inland Empire Regional | Riverside Unified School District | CA | |
| Seckinger High School | C | 2 | 2 | Regional Placeholder | Gwinnett County Public Schools | GA | |
| Seven Lakes High School | C | 2 | 2 | Corpus Christi Regionals | Katy ISD | TX |
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| Seven Lakes Junior High | B | 2 | 2 | Gulf Coast Regional | Katy ISD | TX |
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| Sierra Vista Middle School | B | 10 | 10 | Orange County | IUSD | CA |
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| Solon Middle School | B | 3 | 3 | Northeast & Northern Ohio Regional Tournament | Solon City Schools | OH |
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| South Pasadena High School | C | 3 | 3 | SoCal Joint Regional | South Pasadena Unified School District | CA | |
| Sunset High School | C | 1 | 1 | Oregon Science Olympiad | Beaverton School District | OR | |
| The College Preparatory School | C | 2 | 2 | Alameda Regional Science Olympiad | Oakland USD | CA | |
| Timberline Middle School | B | 4 | 4 | | Lake Washington School District | WA |
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| University Laboratory School (C) | C | 1 | 1 | 2022 HSSO Leeward Regional | Hawaii | HI | |
| Valencia High School (OC) | C | 2 | 2 | SoCal Joint Regional | Placentia-Yorba Linda Unified School District | CA | |
| Venado Middle School | B | 1 | 1 | Southern California | Irvine Unified School District | CA |
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| Walton High School | C | 2 | 2 | Regional Placeholder | Cobb County | GA |
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| Wasatch | B | 1 | 1 | | Wasatch County School District | UT | |
| Wasatch | C | 1 | 1 | | Wasatch County School District | UT | |
| West Ridge Middle School | B | 2 | 2 | TX | Eanes ISD | TX | |
| Westlake High School | C | 1 | 1 | Texas | Eanes ISD | TX | |
| Westview High School | C | 2 | 2 | Oregon Science Olympiad | Beaverton School District | OR | |
| Wilbur Wright Middle School | B | 1 | 1 | Purdue University Northwest Regional | School Town of Munster | IN |
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