Fyn (disambiguation)

Fyn or FYN may refer to:
 * Fyn, or Funen, Denmark
 * Fyn (Folketing constituency)
 * FYN, encoding the proto-oncogene tyrosine-protein kinase Fyn
 * Freshwater, Yarmouth and Newport Railway, a defunct railway of England
 * Fuyun Koktokay Airport, in Xinjiang, China
 * Federal Yugoslav Navy, the navy of the Federal Republic of Yugoslavia