Iron Duke
- 1938 Duke Blue Devils football team
- 37th Armored Regiment
- Arthur Wellesley, 1st Duke of Wellington
- BR Standard Class 7
- Beltrán Alfonso Osorio, 18th duke of Alburquerque
- British Rail Class 87
- Fernando Álvarez de Toledo, 3rd Duke of Alba
- GWR 3031 Class
- GWR Iron Duke Class
- George Deukmejian
- HMS Iron Duke (1870)
- HMS Iron Duke (1912)
- HMS Iron Duke (F234)
- Iron Baron (disambiguation)
- Iron Duke (pub)
- Iron Duke engine
- Iron Lady (disambiguation)
- Iron Lord (disambiguation)
- Iron Man (disambiguation)
- Iron Marshal (disambiguation)
- Iron Woman (disambiguation)
- Irvin Khoza
- John F. Thompson (politician)
- Luís Alves de Lima e Silva, Duke of Caxias
- Robert William Wilcox
- South Australia
- The Iron Duke (film)
- The Iron Duke (novel)
- William Mark Duke