No. 4 may refer to: The number 4 No. 4, a 1966 experimental film directed by Yoko Ono No. 4 (album), by the rock band Stone Temple Pilots No. 4 Commando, Commando regiment in the UK Army No. 4 Squadron RAAF, Royal Australian Air Force squadron No. 4 Squadron RAF, Royal Air Force squadron String Quartet No. 4 (disambiguation), the title of compositions by multiple composers Symphony No. 4 (disambiguation), the title of compositions by multiple composers