JY or Jy may refer to:
People Jimmy Young (broadcaster) (1921–2016), BBC radio broadcaster James Young (American musician) (born 1949), guitarist for Styx Joey Yung (born 1980), Hong Kong cantopop singer Kang Ji-young (born 1994), South Korean actress and singer
Other uses Air Turks and Caicos, IATA airline designator JY Jansky (symbol Jy), a non-SI unit of spectral flux density Japanese yen, a currency unit Jia Yu Channel, a 24-hour Mandarin subscription channel founded in Malaysia Jesus Youth (symbol Jy), an international missionary movement at the service of the Catholic Church , symbol for the Yamanote Line, a loop line operated by the East Japan Railway Company. JY cell line, Epstein-Barr virus (EBV)-immortalised b cell lymphoblastoid line