| Name | City | St. | Country | Clubs | Update | Map |
| Adamsville Junior / Senior High School | Adamsville | Tennessee | | | 01-01-2002 |  |
| Adda Clevenger Junior Preparat | San Francisco | California | | | 03-26-2006 | |
| Addison High School | Addison | Alabama | | | 02-15-2007 | |
| Addison High School | Addison | Michigan | | | 01-01-2002 | |
| Addison HS | Addison | New York | | | 01-01-2002 | |
| Addison Trail High School | Addison | Illinois | | | 01-01-2002 | |
| Adela Brenes Texidor | Guayama | PR | | | 01-01-2002 | |
| Adelphi Academy | Brooklyn | New York | | | 01-01-2002 | |
| Adelphi University | Garden City | New York | | | 01-02-2001 | |
| Adena High School | Frankfort | Ohio | | | 01-01-2002 | |
| Adirondack Christian School | Wilmington | New York | | | 01-01-2002 | |
| Adirondack Community College | Queensbury | New York | | | 01-02-2001 | |
| Adirondack HS | Boonville | New York | | | 01-01-2002 | |
| Adlai E Stevenson High School | Lincolnshire | Illinois | | | 01-01-2002 | |
| Adlai E. Stevenson HS | Bronx | New York | | | 01-01-2002 | |
| Adlai Stevenson High School | Sterling Heights | Michigan | | | 01-01-2002 | |
| Admiral Farragut Academy | St Petersburg | Florida | | | 01-01-2002 | |
| Admiral King High School | Lorain | Ohio | | | 01-01-2002 | |
| Adna Middle/high School | Adna | Washington | | | 01-01-2002 | |
| Adolfina Irizarry | Toa Baja | PR | | | 01-01-2002 | |
