No. 4 may refer to:
* The number
4
*''No. 4'', a 1966 experimental film directed by
Yoko Ono
Yoko Ono (, usually spelled in katakana as ; born February 18, 1933) is a Japanese multimedia artist, singer, songwriter, and peace activist. Her work also encompasses performance art and filmmaking.
Ono grew up in Tokyo and moved to New York ...
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''No. 4'' (album), by the rock band Stone Temple Pilots
*
No. 4 Commando, Commando regiment in the UK Army
*
No. 4 Squadron RAAF
No. 4 Squadron is a Royal Australian Air Force squadron composed of the air force special forces Combat Controllers, aircrew who operate the Pilatus PC-21 aircraft and instructors for the Australian Defence Force Joint Terminal Attack Controll ...
, Royal Australian Air Force squadron
*
No. 4 Squadron RAF
No. 4 Squadron, also known as No. IV Squadron, is a squadron of the Royal Air Force. Since November 2011, it has operated the BAE Hawk T2 from RAF Valley, Anglesey, Wales. The squadron provides weapons and tactics training for student pilots a ...
, Royal Air Force squadron
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''String Quartet No. 4'' (disambiguation), the title of compositions by multiple composers
*
''Symphony No. 4'' (disambiguation), the title of compositions by multiple composers
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