Udy or UDY may refer to:

People

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  • Dan Udy (1874–1935), New Zealand rugby union player.
  • Giles Udy (born 1956), English writer and historian of the Soviet Gulag system.
  • Gloster Udy (1918–2003), Australian Uniting Church minister and author.
  • Hart Udy (1857–1934), New Zealand rugby union player.
  • James Udy (1920–2003), Australian Uniting Church minister.
  • Marvin J. Udy (1892-1959), American engineer.

Other

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  • Udy (river), a river in Belgorod Oblast (Russia) and Kharkiv Oblast (Ukraine).
  • Udy (village), a village in Kharkiv Oblast, Ukraine.