| The Ambrosia Effect |
| The Ambrosian Singers |
| The Ambulance |
| The AMC Orchestra |
| The Amen Choir |
| The American Analog Set |
| The American Band of the Allied Expeditionary Force |
| The American Band of the Supreme Allied Command |
| The American Boychoir |
| The American Breed |
| The American Buffalo |
| The American Frontier |
| The American Hotel System |
| The American Plague |
| The American Scene |
| The American Storytellers |
| The American Theatre Orchestra |
| The Americanos |
| The Americans |
| The Americojones Experience |
| The Ames Brothers |
| The Amethyst |
| The Amish Heaters |
| The Amity Affliction |
| The Amixers |
| The Ammy |
| The Amnesiacs |
| The amnesiacs & the amnesiacs |
| The Amorphous Band |
| The Amorphous Strums |
| The Ampersands |
| The Amplifetes |
| The Amps |
| The Anachronisms |
| The Anachronistics |
| The Anaconda Vampire Bats |
| The Analog Girl |
| The Analogs |
| The Ananda Project |
| The Anarchy |
| The Anastomoses |
| The Anatol |
| The Anatomy Of |
| The Ancestry Program |
| The Anchor |
| The Anchoress |
| The Anchorites |
| The Ancient Moons |
| The Ancient Novelties |
| The Ancient Robotz |
| The Ancient Unknown |
| The And/Ors |
| The Andantes |
| The Anderson |
| The Anderson Council |
| The Andrè |
| The André Previn Trio |
| The Andrea True Connection |
| The Andrew Oldham Orchestra |
| The Andrews Sisters |
| The Andrews Surfers |
| The Androids |
| The Andromeda Project |
| The Andrzejs |
| The Angel Choir |
| The Angel City Brass |
| The Angel Like Expression |
| The Angel Whispers |
| The Angelic Gospel Singers |
| The Angelica Quartet |
| The Angellik |
| The Angels |
| The Anger |
| The Angiosperms |
| The Angry Hippies |
| The Angry Kids |
| The Angry Lisas |
| The Animal Party |
| The Animal Warfare Act |
| The Animalhouse |
| The Animals |
| The Animals II |
| The Animist |
| The Anita Kerr Quartet |
| The Anita Kerr Singers |
| The Anix |
| THE ANKH |
| The Anmer |
| The Anna Maze |
| The Anniversary |
| The Anointed Disciples |
| The Anointed Pace Sisters |
| The Anonymous |
| The Anonymous Chronicles |
| The Anonymous Donkey |
| The Anonymous Experiment |
| The Anonymous Muso |
| The Anonymous One |
| The Anorexic Olsen Twin |
| The Answer |
