4U or 4 U may refer to:

Music 4U (album), by Elva Hsiao, 2002 4U (Christina Milian EP), 2015 4 U (Cody Simpson EP), 2010 4U: Outside, an EP by BtoB, 2021 "4U", a song by Aero Chord, 2015 "4U", a song by Blackbear from Deadroses, 2015 "4 U", a song by Korn from Issues, 1999 "4U", a song by Pi'erre Bourne from The Life of Pi'erre 5, 2021

Other uses Germanwings (former IATA code: 4U), a former German low-cost airline subsidiary of Lufthansa 4U, a rack unit size 4U, the final (4th) catalog of Uhuru x-ray sources 4U:Abo Jana a popular energy drink in Iraq made by abo Jana

See also U4 (disambiguation) For You (disambiguation)