| Name | City | St. | Country | Clubs | Update | Map |
| Adairsville High School | Adairsville | Georgia | | | 01-01-2002 |  |
| Adams Central High School | Monroe | Indiana | | | 01-01-2002 | |
| Adams Central Jr-sr High Sch | Hastings | Nebraska | | | 01-01-2002 | |
| Adams City High School | Commerce City | Colorado | | | 01-01-2002 | |
| Adams Co Christian School | Natchez | Mississippi | | | 01-01-2002 | |
| Adams County Christian Academy | Gettysburg | Pennsylvania | | | 07-01-2007 | |
| Adams County Chrn School | West Union | Ohio | | | 01-01-2002 | |
| Adams Protestant Reformed Chri | Wyoming | Michigan | | | 01-01-2002 | |
| Adams State College | Alamosa | Colorado | | | 01-02-2001 | |
| Adams-friendship El | Adams | Wisconsin | | | 01-01-2002 | |
| Adams-friendship Hi | Adams | Wisconsin | | | 01-01-2002 | |
| 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 | |
