- The ARRS
- The Artist Must Draw
- The Arusha Accord
- The Asado
- The Asbestos
- The Ascetic Junkies
- The Ashtray Hearts
- The Assassinators
- The Assemblie
- The Associates
- The Asteroid No 4
- The Asteroids Galaxy Tour
- The Astronauts
- The Atlantics
- The Atomic Fireballs
- The Attic
- The Attractions
- The Audition
- The Audreys
- The August Infinity
- The Aurora Project
- The Authorities
- The Automatic
- The Automatics
- The Autumn Film
- The Autumn Offering
- The Autumns
- The Avalanches
- The Avener
- The Avengers
- The Avett Brothers
- The Awkward Romance
- The Awkward Stage
- The Axe Band
- The Axis Of Awesome
- The Axis Of Perdition
- The B Foundation
- The B-52s
- The B52s
- The Babe Rainbow
- The Babies
- The Baby Grands
- The Babysitters Circus
- The Bachelors
- The Back Horn
- The Background
- The Backyardigans
- The Bad Plus
- The Bags
- The Bakerton Group