Iron Duke may refer to:

• William Mark Duke (1879–1971), Archbishop of Vancouver
• Irvin Khoza (born 1948), South African football administrator
• John F. Thompson (politician) (1920–1965), U.S. politician
• Fernando Álvarez de Toledo, 3rd Duke of Alba (1507–1582), Spanish noble, general, and diplomat involved in the Eighty Years' War
• Luís Alves de Lima e Silva, Duke of Caxias (1803–1880), Brazilian army officer and politician
• Arthur Wellesley, 1st Duke of Wellington (1769–1852), British soldier and statesman
• Beltrán Alfonso Osorio, 18th duke of Alburquerque (1918–1994), Spanish noble and amateur jockey
• Robert William Wilcox (1855–1903), Hawaiian revolutionary soldier and politician
• George Deukmejian (1928-2018), Governor of California

• HMS Iron Duke, any of several British Royal Navy ships
• HMS Iron Duke (1870), a battleship sold for scrap in 1906
• HMS Iron Duke (1912), the fleet flagship at the Battle of Jutland
• HMS Iron Duke (F234), a Type 23 frigate launched in 1991

• GWR Iron Duke Class, a class of locomotive built by the Great Western Railway in England
• Iron Duke, a GWR 3031 Class locomotive built in 1892
• BR Standard Class 7 Iron Duke number 70014 built in 1951
• British Rail Class 87 Iron Duke number 87017 built in 1974

• Iron Duke engine, a 2.5 L I4 piston engine made by General Motors
• Iron Duke (pub), public house in Great Yarmouth, England

• The Iron Duke (film), 1934 film starring George Arliss
• The Iron Duke (novel), by L. Ron Hubbard
• The Iron Dukes, the name the 2nd Battalion 37th Armored Regiment
• 1938 Duke Blue Devils football team, nicknamed the "Iron Dukes"
• Iron Duke, a large iron ore mine in South Australia

• Iron Baron (disambiguation)
• Iron Lady (disambiguation)
• Iron Lord (disambiguation)
• Iron Man (disambiguation)
• Iron Woman (disambiguation)

This disambiguation page lists articles associated with the title Iron Duke.
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