4 (disambiguation)
4 is a number, numeral, and digit.
4 or four may also refer to:

Months and years
AD 4, the fourth year of the AD era4 BC, the fourth year before the AD era
1904
2004
2104
The month of April

Places
Four, Isère, a French commune
4th arrondissement of Paris, an administrative district of Paris, France

Transport
4 (New York City Subway service), service schedule
BMW 4 Series
Renault 4
Polestar 4, an electric SUV

Film, television and radio
4 (2005 film), a 2005 film directed by Ilya Khrzhanovsky
4 (2007 film), a 2007 film directed by Tim Slade
Four (2011 film), a 2011 film directed by John Langridge
Four (2012 film), a 2012 film directed by Joshua Sanchez
Four (TV series), an Indian soap opera
Number Four (Battlestar Galactica), or Simon, is a Cylon model in the re-imagined Battlestar Galactica series.
Numbuh 4, a fictional character in Codename: Kids Next Door
Channel 4, a British television channel
BBC Radio 4, a British radio station
Four (New Zealand TV channel), a New Zealand television channel
News 4 New York, a flagship newscast broadcast on WNBC-TV in New York City
I Am Number Four, a novel, adapted into a 2011 film of the same name
The Four: Battle For Stardom, a 2018 American music reality series

Music
#4, American musician a.k.a. James Root
Four Four, an Australian independent record label

Albums
4 (Beyoncé album), 2011
4 (Dungen album), 2008
4 (Foreigner album), 1981
4 (Fourplay album), 1998
4 (Gerling album), 2006
4 (Johan album), 2009
4 (Kumbia Kings album), 2003
4 (Lead album), 2006
4 (Los Hermanos album), 2005
4 (Slash album), 2022
4 (Supersilent album), 1998
4 (Whigfield album), 2002
:4 (Galliano album), 1996
Four (Bleu album), 2010
Four (Bloc Party album), 2012
Four (Blues Traveler album), 1994
Four (Fair Warning album), 2000
Four! (Hampton Hawes album), 1958
Four (Joe Henderson album), 1968
Four (One Direction album), 2014
Four (Seaweed album), 1993
4 (Matisse EP), 2003
Four (Charlotte Church EP), 2014
Four (Acts of Love), by Mick Harvey, 2013
Fourth (album),  by Soft Machine, 1971
No. 4 (album), by Stone Temple Pilots, 1999
#4 (album), by Ling tosite Sigure, 2005
4: John Paul George Ringo, a 2014 compilation EP featuring songs by John Lennon, Paul McCartney, George Harrison and Ringo Starr
4, a 1984 album by Lipps Inc.
4, a 2010 album by The Bamboos
4, a 2014 album by The Red Jumpsuit Apparatus, 2014
4, an EP by Hunter, 2004
#4, an EP by Suburban Kids with Biblical Names, 2009
IV, 1998 album by Siam Shade

Songs
"4", by Aphex Twin from Richard D. James Album, 1996
"Four", by Lit from A Place in the Sun, 1999
"Song 4", by Babymetal from Babymetal, 2014
"Four" (composition), composition credited to Miles Davis which he first recorded in 1954

Other uses
4, occasionally used in acronyms to mean the word "for"
4 (axiom), an axiom in modal logic
Four (drink), a beverage
Four, scoring ("boundary") situation in cricket
FOUR score, a method of quantifying coma
Fours (Enneagram of Personality), a psychological type of the Enneagram of Personality
Four (comics), fictional characters in Planetary
Four, the nickname of the fictional character Tobias Eaton in the Divergent series of books

Similar glyphs
, symbol for Jupiter
Ч, Che (Cyrillic), a letter of the Cyrillic alphabet
Ɥ, an IPA symbol for the labialized palatal approximant
Կ and Վ, letters of the Armenian alphabet

See also
IV (disambiguation)
04 (disambiguation)
Coxed four and coxless four, types of competitive rowing boat
Dufour/Defour/Du Four/De Four (disambiguation)
Fourth (disambiguation)
Fantastic Four
Gang of Four (disambiguation)
Number Four (disambiguation)
The Four (disambiguation)
Type 4 (disambiguation)
Year Four