17 Corps, 17th Corps, Seventeenth Corps, or XVII Corps may refer to:
- XVII Corps (German Empire), a unit of the Imperial German Army prior to and during World War I
- XVII Reserve Corps (German Empire), a unit of the Imperial German Army during World War I
- XVII Corps (India)
- XVII Corps (Italy)
- XVII Corps (Ottoman Empire)
- XVII Corps (United Kingdom)
- XVII Corps (Union Army)
- XVII Waffen Corps of the SS (Hungarian)