Udy or UDY may refer to:

People

• 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

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

This disambiguation page lists articles associated with the title Udy.
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