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| Albany MS | B | 2 | | 2 | Bay Area Science Olympiad | AUSD | CA | Public |
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| BASIS MS | B | 2 | | 2 | Santa Clara County Regional Science Olympiad | San Jose | CA | Private | |
| Beachwood Middle School | B | 2 | | | Northeast Ohio Regional Tournament | Beachwood | OH | Public | |
| Bedford Middle School | B | 2 | | 2 | n/a | Westport Public Schools | CT | Public | |
| Carmel Valley Middle School | B | 5 | | 5 | SoCal Joint Regional | San Dieguito Union High School District | CA | Public |
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| Chaboya MS | B | 2 | | | Santa Clara County Regional Science Olympiad | Evergreen School District | CA | Public | |
| Challenger Berryessa | B | 2 | | | Santa Clara County Regional Science Olympiad | San Jose | CA | Private | |
| Coleytown Middle School | B | 1 | | | | Westport | CT | Public | |
| Dana Middle School | B | 3 | | 3 | SoCal Joint Regional | Arcadia Unified School District | CA | Public |
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| Dartmouth Middle School | B | 2 | | 2 | Santa Clara County Regional Science Olympiad | Union School District | CA | Public |
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| El Rancho Charter | B | 2 | | 2 | SoCal Joint Regional | Orange Unified | CA | Public | |
| Evergreen Middle School | B | 1 | | | WA Statewide B Regional | Lake Washington School District | WA | Public |
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| Fairmont Private Schools - Anaheim Hills Campus | B | 2 | | | SoCal Joint Regional | Private | CA | Private | |
| International Community School | B | 1 | | 1 | WA Statewide B Regional | LWSD | WA | Public | |
| James Franklin Smith Elementary School | B | 1 | | | Santa Clara County Regional Science Olympiad | Evergreen Elementary School District | CA | Public | |
| Jeffrey Trail Middle School | B | 2 | | | SoCal Joint Regional | Irvine Unified School District | CA | Public | |
| John Gomes Elementary | B | 1 | | | Bay Area Science Olympiad | Fremont Unified School District | CA | Public | |
| Kennedy Middle School | B | 6 | | | Santa Clara County | Cupertino Union School District | CA | Public |
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| Madrona Middle School | B | 1 | | 1 | SoCal Joint Regional | Torrance Unified School District | CA | Public | |
| Marshall Middle School | B | 5 | | | SoCal Joint Regional | San Diego Unified School District | CA | Public | |
| Meadowbrook Middle School | B | 4 | | | SoCal Joint Regional | Poway Unifed School District | CA | Public |
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| Miller MS | B | 2 | | 2 | | Cupertino Union School District | CA | Public |
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| Oak Valley Middle School | B | 6 | | 6 | SoCal Joint Regional | Poway Unified School District | CA | Public |
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| Ocean Air School | B | 3 | | | SoCal Joint Regional | Del Mar Union School District | CA | Public | |
| Piedmont Open IB Middle School | B | 1 | | | | Charlotte-Mecklenburg Schools | NC | Public |
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| Redmond Middle School | B | 6 | | 6 | WA Statewide B Regional | Lake Washington School District | WA | Public | |
| Solon Middle School | B | 2 | | 2 | Northeast Ohio Regional Tournament | Solon City School District | OH | Public | |
| The Academy at Lincoln | B | 2 | | 2 | | Guilford County Schools | NC | Public |
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| Tilden Middle School | B | 2 | | | Central Maryland Region; Div. B | Montgomery County Public Schools | MD | Public | |
| Timberline Middle School | B | 6 | | 6 | WA Statewide B Regional | Lake Washington School District | WA | Public |
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| Vista Verde Middle School | B | 2 | | 2 | SoCal Joint Regional | Irvine Unified School District | CA | Public | |