- The Josh Garrett Band -- The Joy Poppers
- The Joy Project -- The JTG Explosion
- The JTG Implosion -- The Judas Engine
- The Judas Syndrome -- The Juice Crew
- The JuJu Beans -- The July Four
- The Jump Off -- The June Brides
- The June Junes -- The Junior Mace Trio
- The Junior Panthers -- The Just Desserts
- The Just Mes -- The K Sisters
- The K Stars -- The Kaisers
- The Kaldirons -- The Kandidate
- The Kandinsky Effect -- The Karaoke Channel
- The Karaoke Machine -- The Karg Boys