| The Aristokats Orchestra |
| The Ark |
| The Arrogant Sons of Bitches |
| The Arrogant Worms |
| The Arrogants |
| The Arrows |
| The Art Bears |
| The Art Ensemble of Chicago |
| The Art Farmer-Benny Golson Jazztet |
| The Art of Noise |
| The Artful Dodger |
| The Arthur Blythe Quartet |
| The Arthur Brothers |
| The Arthur Cable Blues Band |
| The Artifacts |
| The Artistics |
| The Artwoods |
| The Aryans |
| The As-Is Ensemble |
| The Asbury Jukes |
| The Ashley Hutchings Allstars |
| The Ashley Sisters |
| The Ashtray Hearts |
| The Asmussen/Thigpen Quartet |
| The Assembled Multitude |
| The Associates |
| The Association |
| The Asteroids Galaxy Tour |
| The Aston Shuffle |
| The Astor-Grande Christmas Band |
| The Astors |
| The Astroids Galaxy Tour |
| The Astronauts |
| The Astronettes |
| The Asylum Choir |
| The Ataris |
| The Athenians |
| The Atkins Family |
| The atl project |
| The Atlanta Centennial Mass Choir |
| The Atlantics |
| The Atomic Bitchwax |
| The Atomic Fireballs |
| The Atomic Harvesters |
| The Atomic Planets |
| The Atomics |
| The Attic |
| The Attics |
| The Attractions |
| The Au Go-Go Singers |
| The Au Pairs |
| The Aubreys |
| The Audio Conspiracy |
| The Audition |
| The Audreys |
| The Augusta Choir |
| The Austin Klezmorim |
| The Australian Jazz Quintet |
| The Auteurs |
| The Authentic Art Hodes Rhythm Section |
| The Automatic |
| The Autumn Defense |
| The Autumn Offering |
| The Autumns |
| The Avalanches |
| The Avalon Big Band |
| The Avalons |
| The Avant Gardeners |
| The Avener |
| The Avengers |
| The Average White Band |
| The Avett Brothers |
| The Avons |
| The Awakened |
| The Awakening |
| The Aware |
| The Awkward Years |
| The Axis of Awesome |
| The Axis Worship Band |
| The Azoic |
| The Aztecs |
| The B-52s |
| The B.B. & Q. Band |
| The B-Sides |
| The B-Stars |
| The B. Swanson Quartet |
| The B.U.M.S |
| The Baboon Show |
| The Baby Bubbas |
| The Baby Einstein Music Box Orchestra |
| The Baby Loves Jazz Band |
| The Baby\'s |
| The Babys |
| The Bachelors |
| THE BACK HORN |
| The Back Pack |
| The Backbeats |
| The Backing Tracks |
| The Backroom Boys |
| The Backyardigans |
