Smilin' Jack
Smilin' Jack or Smiling Jack may refer to:
- The [Adventures of Smilin' Jack], an American newspaper cartoon strip that ran from 1933 to 1973
- * The Adventures of Smilin' Jack (serial), a film serial based on the cartoon strip
- Smilin' Jack Smith, an American singer, radio host, and actor
- John M. Conroy, an American actor, aviator, and businessman, nicknamed "Smiling Jack"
- John [Tait (runner)], a Canadian athlete
- John F. Wiley, an American football player and coach, nicknamed "Smiling Jack"