| | | | | | | |
| Altamont ES | B | 1 | 1 | | Lammersville Unified School District | San Joaquin | CA |
| Alvarado Intermediate School | B | 1 | 1 | SoCal Joint Regional | Rowland Unified School District | Los Angeles County | CA |
| Amador Valley High School | C | 1 | 1 | Alameda Regional Science Olympiad | Pleasanton USD | Alameda | CA |
| American High School | C | 3 | 3 | Alameda Regional Science Olympiad | Fremont Unified School District | Alameda | CA |
| Arnold O. Beckman High School | C | 2 | 2 | | Tustin Unified | Orange County | CA |
| Barstow Junior High School | B | 1 | | | Barstow High School | San Bernadino | CA |
| BASIS Cedar Park | B | 1 | 1 | Texas UT Austin | Charter | Williamson | TX |
| BASIS Independent Fremont | C | 2 | 2 | Alameda Regional Science Olympiad | Fremont USD | Alameda | CA |
| BASIS Independent Fremont (MS) | B | 3 | 3 | Alameda Regional Science Olympiad | Fremont USD | Alameda | CA |
| BASIS MS (San Jose) | B | 1 | 1 | Santa Clara County Regional Science Olympiad | Private | Santa Clara | CA |
| Basis Pflugerville | B | 2 | 2 | n/a | Charter | Basis | TX |
| Beckendorff Junior High | B | 2 | 2 | University of Texas Regional | Katy ISD | Fort Bend | TX |
| Bellarmine College Preparatory | C | 2 | | Santa Clara County Regional Science Olympiad | Santa Clara | Santa Clara | CA |
| Bridges Academy | C | 1 | 1 | | LAUSD | Los Angeles | CA |
| Burbank High School | C | 1 | 1 | | Burbank Unified School District | Los Angeles Country | CA |
| Burlingame High School | C | 2 | 2 | Bay Area Regional Science Olympiad | San Mateo UHSD | San Mateo | CA |
| Burlingame Intermediate School | B | 2 | 2 | Bay Area Regional Science Olympiad | Burlingame | San Mateo | CA |
| Canyon MS (Bay Area) | B | 3 | 3 | Alameda Regional Science Olympiad | Castro Valley USD | Alameda | CA |
| Central Catholic HS | C | 1 | 1 | Stanislaus County Science Olympiad | Diocese of Stockton (private) | Stanislaus | CA |
| Chaboya MS | B | 4 | 4 | Santa Clara County Regional Science Olympiad | Evergreen School District | Santa Clara | CA |
| Clovis West | C | 1 | 1 | Fresno County Regional Science Olympiad | Clovis Unified School District | Fresno | CA |
| Creekside MS | B | 3 | 3 | Alameda Regional Science Olympiad | Castro Valley USD | Alameda | CA |
| Cumberland High School | C | 3 | 3 | | Cumberland Public Schools | Providence | RI |
| Daniel Wright Junior High School | B | 2 | 2 | Illinois Regional | Lincolnshire-Prairie View District 103 | Lake | IL |
| Dartmouth Middle School | B | 2 | 2 | Santa Clara County Regional Science Olympiad | Union School District | Santa Clara County | CA |
| Dublin High School | C | 1 | 1 | Alameda Regional Science Olympiad | Dublin Unified School District | Alameda | CA |
| Eastlake High School | C | 4 | 4 | Regional - NW (Division C)-RAHS | Lake Washington School District | King | WA |
| Eastside High School | C | 2 | 2 | | Antelope Valley Union High School District | Los Angeles | CA |
| Etiwanda High School | C | 2 | 2 | | Chaffey Joint Union High School District | San Bernardino | CA |
| Evergreen Middle School | B | 2 | 2 | Regional - Northwest B #1 | Lake Washington School District | King County | WA |
| Fallon Middle | B | 1 | 1 | Alameda Regional Science Olympiad | Dublin USD | Alameda | CA |
| Flintridge Sacred Heart Academy | C | 1 | 1 | SoCal Joint Regional | Independent | Los Angeles | CA |
| Foothill High School | C | 2 | 2 | Alameda Regional Science Olympiad | Pleasanton USD | Alameda | CA |
| Fred T Korematsu Middle School | B | 2 | 2 | Bay Area Regional Science Olympiad | West Contra Costa Unified School District | Contra Costa County | CA |
| G.M. Walters Middle School | B | 1 | 1 | | Fremont Unified School District | Alameda | CA |
| Garvey Intermediate | B | 1 | | SoCal Joint Regional | Garvey School District | Los Angeles | CA |
| Glen A. Wilson High School | C | 2 | 2 | SoCal Joint Regional | Hacienda La Puente Unified | Los Angeles | CA |
| Greene MS | B | 3 | 3 | Santa Clara County Regional Science Olympiad | Palo Alto Unified School District | Santa Clara | CA |
| Harvard-Westlake School | C | 3 | 3 | SoCal Joint Regional | Independent | Los Angeles | CA |
| Highlands Intermediate School | B | 4 | 4 | 2022 HSSO Leeward Regional | Leeward District | Hawaii | HI |
| Hikmah | B | 1 | 1 | Bay Area Regional Science Olympiad | Brentwood Union School District | Contra Costa County | CA |
| Hopkins Jr. High | B | 3 | 3 | Alameda Regional | Fremont Unified School District | Alameda | CA |
| Hyde MS | B | 4 | 4 | Santa Clara County Regional Science Olympiad | Cupertino Union School District | Santa Clara | CA |
| International Community School | C | 1 | 1 | Regional - Northwest C #2 | LWSD | King County | WA |
| Irvine High School | C | 2 | 2 | SoCal Joint Regional | Irvine Unified School District | Orange County | CA |
| J. L. Stanford Middle School | B | 1 | 1 | Santa Clara County Regional Science Olympiad | Palo Alto Unified School District | Santa Clara | CA |
| J.L. Stanford Middle School | B | 2 | 2 | | Palo Alto Unified School District | Santa Clara | CA |
| Jeffrey Trail Middle School | B | 4 | 4 | | Irvine Unified School District | Orange County | CA |
| Justin Garza High School | C | 1 | 1 | Fresno County Regional Science Olympiad | Central Unified School District | Fresno | CA |
| Kennedy Middle School | B | 8 | 8 | Santa Clara County Regional Science Olympiad | Cupertino Union School District | Santa Clara | CA |
| KIPP King Collegiate | C | 1 | 1 | Alameda Regional Science Olympiad | San Lorenzo | Alameda | CA |
| Lakeside School | C | 3 | 3 | Regional - Northwest (Division C)-RAHS | Northwest Association of Independent Schools | King | WA |
| Larchmont Charter School | C | 1 | 1 | SoCal Joint Regional | Los Angeles Unified | Los Angeles | CA |
| Lone Hill Middle School | B | 1 | 2 | SoCal Joint Regional | Bonita Unified School District | Los Angeles | CA |
| Marin Academy | C | 1 | 1 | Bay Area Regional Science Olympiad | NA - private | Marin County | CA |
| McNeil High IB World School | C | 1 | 1 | Texas | Round Rock ISD | Williamson | TX |
| Merced HS | C | 1 | 1 | Stanislaus County Science Olympiad | Merced Union High School District | Merced | CA |
| Miller MS | B | 4 | 4 | Santa Clara County Regional Science Olympiad | Cupertino Union School District | Santa Clara | CA |
| Monta Vista High School | C | 4 | 4 | Santa Clara County Regional Science Olympiad | Fremont Union High School District | Santa Clara | CA |
| Mountain View High School | C | 3 | 3 | Santa Clara County Regional Science Olympiad | Mountain View Los Altos High School District | Santa Clara | CA |
| Nogales High School | C | 2 | 2 | | Rowland Unified School District | Los Angeles | CA |
| Oak Avenue Intermediate School | B | 1 | 1 | SoCal Joint Regional | Temple City | LA | CA |
| Oak Middle School | B | 1 | 1 | SoCal Joint Regional | Los Alamitos Unified School District | Orange County | CA |
| OCSA | B | 1 | 1 | OC | Orange County Department of Education | Orange | CA |
| Pacific Academy - Irvine | C | 1 | 1 | | Irvine Unified School District (Private) | Orange County | CA |
| Palm Desert High School | C | 1 | 1 | | Desert Sands Unified School District | Riverside | CA |
| Palos Verdes Peninsula High School | C | 2 | 2 | SoCal Joint Regional | Palos Verdes Peninsula School District | Los Angeles | CA |
| Paxton Middle School | B | 1 | 1 | Esu10 | Paxton Consolidated Schools | Keith | NE |
| Paxton High School | C | 1 | 1 | ESU10 | Paxton Consolidated Schools | Keith | NE |
| Pearl City High School | C | 3 | 3 | 2022 HSSO Leeward Regional | Leeward District | HIDOE/Hawaii DOE | HI |
| Pearson Ranch Middle School | B | 2 | 2 | Texas | Round Rock ISD | Williamson | TX |
| Pinewood School | B | 1 | 1 | Santa Clara County Regional Science Olympiad | Los Altos Hills | Santa Clara County | CA |
| Princeton Day School | B | 1 | 1 | New Jersey | private | Mercer | NJ |
| Rancho Bernardo High School | C | 3 | 3 | SDSO | Poway Unified School District | San Diego | CA |
| Rancho San Joaquin Middle School | B | 2 | 2 | Orange | Irvine Unified | Orange County | CA |
| Redwood Middle School | B | 4 | 4 | Santa Clara County Regional Science Olympiad | Saratoga Union SD | Santa Clara | CA |
| San Dimas High School | C | 2 | 2 | SoCal Joint Regional | Bonita Unified School District | Los Angeles | CA |
| Santa Monica High School | C | 2 | 2 | | Santa Monica Unified School Distric | Los Angeles | CA |
| Scripps Ranch High School | C | 7 | 7 | SDSO | San Diego Unified School District | CA | CA |
| Sierra Vista Middle School | B | 5 | | Orange County | IUSD | Orange County | CA |
| Silicon Valley Home School | C | 1 | 1 | Santa Clara County Regional Science Olympiad | San Jose Unified School District | Santa Clara County | CA |
| Silvercreek High School | C | 2 | 2 | Santa Clara County Regional Science Olympiad | East Side Union High School District | Santa Clara | CA |
| South Pasadena High School | C | 2 | 2 | SoCal Joint Regional | South Pasadena Unified School District | Los Angeles | CA |
| Stargate Charter School | C | 3 | 3 | Colorado Northern Regional | Adams 12 Five Star Schools | Broomfield | CO |
| Stargate Charter School | B | 3 | 3 | Colorado Northern Regional | Adams 12 | Adams | CO |
| Stratford Preparatory | B | 1 | 1 | Santa Clara County Regional Science Olympiad | Private | Santa Clara | CA |
| Stratford Preparatory Blackford | C | 1 | 1 | Santa Clara County Regional Science Olympiad | Private | Santa Clara | CA |
| Students on the Academic Rise | C | 1 | | | Antelope Valley Union High School District | Los Angeles County | CA |
| Sunset High School | C | 1 | 1 | Oregon Science Olympiad | Beaverton School District | Washington | OR |
| Sutter MIddle School | B | 3 | 3 | Sacramento Regional Science Olympiad | Folsom Cordova Unified School District | Sacramento | CA |
| Tenafly MS | B | 1 | 1 | New Jersey Science Olympiad | Tenafly Public Schools | Bergen | NJ |
| The Bishop's School | C | 1 | 1 | SDSO | Private School | San Diego | CA |
| The College Preparatory School | C | 2 | 2 | Alameda Regional Science Olympiad | Oakland USD | Alameda | CA |
| Timberline Middle School | B | 1 | 1 | Regional - NW (Division B)-RAHS | Lake Washington School District | King County | WA |
| Troy H.S. | C | 2 | 2 | | Fullerton Joint Unified School District | Orange | CA |
| Tumwater Cosmic Catalysts | B | 1 | 1 | Tumwater Middle School | BSD | Washington | OR |
| Turlock HS | C | 1 | 1 | Stanislaus County Science Olympiad | Turlock Unified School District | Stanislaus | CA |
| United Christian Academy | C | 1 | 1 | | Chaffee Joint Union High School District | San Bernardino County | CA |
| University Park Elementary School | B | 1 | 1 | | Irvine school district | Orange County | CA |
| Vestal High School | C | 3 | 3 | Southern Tier | Vestal Central School District | New York | NY |
| Washington High School | C | 1 | 1 | Alameda Regional Science Olympiad | Fremont Unified School District | Alameda County | CA |
| Westview High School | C | 2 | 2 | SDSO | Poway Unified School District | San Diego | CA |
| Westview HS | C | 1 | 1 | Oregon Science Olympiad | Beaverton School District | Washington County | OR |
| Wicklund Elementary | B | 1 | | San Joaquin County | Lammersville Unified | San Joaquin | CA |
| William Hopkins Middle School | B | 1 | | Alameda Regional Science Olympiad | Fremont Unified School District | Alameda | CA |
| Woodbridge High | C | 1 | 1 | | Irvine Unified School District | Orange County | CA |