4 Corps, 4th Corps, Fourth Corps, or IV Corps may refer to:
France
- 4th Army Corps (France)
- IV Cavalry Corps (Grande Armée), a cavalry unit of the Imperial French Army during the Napoleonic Wars
- IV Corps (Grande Armée), a unit of the Imperial French Army during the Napoleonic Wars
Germany
- IV Cavalry Corps (German Empire), a unit of the Imperial German Army
- IV Corps (German Empire), a unit of the Imperial German Army
- IV Reserve Corps (German Empire), a unit of the Imperial German Army
- IV Army Corps (Wehrmacht), a unit of the German Army in World War II
Soviet Union
- 4th Airborne Corps (Soviet Union)
- 4th Guards Army Corps
- 4th Guards Cavalry Corps
- 4th Cavalry Corps (Soviet Union)
- 4th Guards Mechanized Corps
- 4th Mechanized Corps (Soviet Union)
- 4th Rifle Corps
- 4th Guards Tank Corps
United States
- IV Corps (United States)
- IV Corps (Union Army)
- Fourth Corps, Army of Northern Virginia
- Fourth Army Corps (Spanish–American War)
Others
- 4th Army Corps (Armenia)
- 4th Army Corps (Azerbaijan)
- IV Army Corps (Greece)
- IV Corps (Hungary)
- IV Corps (India)
- IV Corps (North Korea)
- IV Corps (Ottoman Empire)
- IV Corps (Pakistan)
- 4th Territorial Army Corps (Romania)
- IV Corps (South Vietnam)
- IV Army Corps (Spain)
- IV Corps (United Kingdom)
- 4th Corps (Vietnam People's Army)
See also
- List of military corps by number
- 4th Army (disambiguation)
- 4th Brigade (disambiguation)
- 4th Division (disambiguation)
- 4th Regiment (disambiguation)
- 4th Squadron (disambiguation)
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