Foundling or The Foundling may refer to:

• Foundling hospital, an institution where abandoned children were cared for
  • Foundling Hospital, Dublin, founded 1704
  • Foundling Hospital, Cork, founded 1737
  • Foundling Hospital, founded 1739 in London
• Foundling Museum, a museum telling the story of the London Foundling Hospital

• The Foundling and Other Tales of Prydain, a prequel to Lloyd Alexander's The Chronicles of Prydain
• The Foundling (Heyer novel), a 1948 novel by Georgette Heyer
• The Foundling (Leary novel), a 2022 novel by Ann Leary
• The Foundling (play), a 1748 play by Edward Moore
• The History of Tom Jones, a Foundling, a 1749 novel by Henry Fielding
• Monster Blood Tattoo: Foundling, the first book of the Monster Blood Tattoo fantasy trilogy by D. M. Cornish

• Foundling (album), the ninth studio album by David Gray
  • "Foundling", the album's title track
• The Foundling (album), a 2010 album by Mary Gauthier
• "Foundling" (Cardiacs song), 1996
• "Foundling", a song by the Unthanks from Mount the Air

• The Foundling (1915 film), a silent film directed by John B. O'Brien
  • The Foundling (1916 film), a remake of the 1915 film, also directed by O'Brien
• The Foundling (1940 film), a 1940 comedy drama

• An abandoned child, see child abandonment
• New York Foundling, a child welfare agency
• Foundlings (Noon Universe), characters in the fictional Noon Universe created by Arkady and Boris Strugatsky
• "Chapter 20: The Foundling"