IV Corps
- 4th Airborne Corps (Soviet Union)
- 4th Army (disambiguation)
- 4th Army Corps (Armenia)
- 4th Army Corps (Azerbaijan)
- 4th Army Corps (France)
- 4th Brigade (disambiguation)
- 4th Cavalry Corps (Soviet Union)
- 4th Corps (Vietnam People's Army)
- 4th Division (disambiguation)
- 4th Guards Army Corps
- 4th Guards Cavalry Corps
- 4th Guards Mechanized Corps
- 4th Guards Tank Corps
- 4th Mechanized Corps (Soviet Union)
- 4th Regiment (disambiguation)
- 4th Rifle Corps
- 4th Squadron (disambiguation)
- 4th Territorial Army Corps (Romania)
- Fourth Army Corps (Spanish–American War)
- Fourth Corps, Army of Northern Virginia
- IV Army Corps (Greece)
- IV Army Corps (Spain)
- IV Army Corps (Wehrmacht)
- IV Cavalry Corps (German Empire)
- IV Cavalry Corps (Grande Armée)
- IV Corps (Continuation War)
- IV Corps (German Empire)
- IV Corps (Grande Armée)
- IV Corps (Hungary)
- IV Corps (India)
- IV Corps (North Korea)
- IV Corps (Ottoman Empire)
- IV Corps (Pakistan)
- IV Corps (South Vietnam)
- IV Corps (Union Army)
- IV Corps (United Kingdom)
- IV Corps (United States)
- IV Corps (Winter War)
- IV Reserve Corps (German Empire)
- List of military corps by number