100th Regiment
# 100th Regiment

100th Regiment or 100th Infantry Regiment may refer to:

* 100th Regiment of Foot (disambiguation), several units of the British Army
* 100th Anti-Tank Regiment, Royal Artillery (The Gordon Highlanders)
* 100th Heavy Anti-Aircraft Regiment, Royal Artillery
* 100th Guards Fighter Aviation Regiment
* 100th Independent Shipborne Fighter Aviation Regiment

Union Army (American Civil War):

* 100th Illinois Infantry Regiment
* 100th Indiana Infantry Regiment
* 100th New York Volunteer Infantry
* 100th Ohio Infantry
* 100th Pennsylvania Infantry Regiment
