Conn may refer to:

  • Conn (name), a family name and a masculine given name
  • Conn (nautical), the duty of giving directions for movement from the deck of a ship to the helm
  • Conn of the Hundred Battles, a figure from Irish mythology
  • C.G. Conn, Inc., a manufacturer of musical instruments
  • Conn-Selmer, Inc., a manufacturer and distributor of musical instruments
  • Conn, Ontario, Canada
  • Lough Conn, a lake in County Mayo, Connacht, Ireland
  • Connecticut, United States
    • Connecticut College, a liberal arts college in New London, Connecticut, USA
  • Connection string