- 3rd Edge
- 3rd Faze
- 3rd Force
- 3rd Matinee
- 3rd Party (Dance-pop, Eurodance group)
- 3rd Prototype
- 3rd Prototype feat. Harley Bird/ Franco, Valentina
- 3rd Root
- 3RD Season
- 3rd Secret (grunge supergroup)
- 3rd Storee
- 3rd Strike
- 3rd Trip
- 3rdegree (USA Prog Rock Band)
- 3rio, The
- 3robi (Dutch-Moroccan rapper)
- 3rty (Nigerian Afrocentric Musician)
- 3somesisters
- 3Strange & Grace, Kenya
- 3T (Taj, Taryll and TJ Jackson)
- 3T duet with Jackson, Michael
- 3T feat. Crichlow, Herbie
- 3T feat. Jackson, Michael
- 3T feat. Prince Markie Dee
- 3TEETH
- 3TEETH & Gordon, Mick
- 3TEETH feat. Gordon, Mick
- 3than
- 3union
- 3viertelelf
- 3X (IDOLY PRIDE)
- 3x Krazy
- 3x1
- 3x3cute (music producer)
- 3xbravo
- 3YE
- 3Yo
- 4 Apostel, Die
- 4 by Four
- 4 Cats
- 4 Circles (Nikita Vasilyev)
- 4 Clubbers
- 4 Door Theater (Alt/ Pop - USA Members: Garrett Joseph Cyr, Bipul Lama & Mark A. Demao Established in 2014)
- 4 Elements
- 4 For Fall
- 4 Front
- 4 Grandes del Norte, Los
- 4 in Love
- 4 Non Blondes
- 4 of Us, The (Northern Irish band)
- 4 Out of 5 Doctors
- 4 P.M. (R&B quartet from Baltimore)
- 4 Promille
- 4 PS
- 4 Strings (Netherlands dance duo)
- 4 Strings & Burton, Cathy
- 4 Strings & Day, Fenna
- 4 Strings & Fridolijn
- 4 Strings & Gallagher, Audrey
- 4 Strings & Heath, Katty
- 4 Strings & Lee, Carol
- 4 Strings & Rivera, Denise
- 4 Strings & Sue McLaren
- 4 Strings feat. Cousins, Tina
- 4 Strings feat. Criado, Ana
- 4 Strings feat. Lawson, Ellie
- 4 Strings feat. Lumiere, Eric
- 4 Strings feat. Sphere
- 4 the Cause
- 4 to the Bar (German lounge/latin/jazz quartet)
- 4 to the Bar (garage house ("Slam Me Baby" feat. Alexis P. Suter))
- 4 Trinity (Christian music rap group)
- 4 Tune Fairytales
- 4 Villains
- 4 Wings
- 4 Zimmer Küche Bad
- 4-2-4 (football anthems)
- 4-4-2
- 4-Kuma
- 4‐Skins, The
- 4.0 (RnB/swing/soul group)
- 4*
- 4*TOWN (fictional band)
- 4*Town, Fisher, Jordan, Finneas, Levi, Josh, Ngo, Topher & Villanueva, Grayson
- 4+1 Ensemble
- 40 Below Summer
- 40 Cal.
- 40 Fingers
- 40 Ft. Ringo
- 40 Glocc
