36th Battalion or 36th Infantry Battalion may refer to:
36th Battalion (Australia): an Australian infantry battalion that served during World War I and after; 36th Battalion, CEF: a Canadian infantry battalion that served during World War I; 36th Battalion (New Zealand): a New Zealand infantry battalion that served during World War II; 36th Virginia Cavalry Battalion: a unit of the Confederate States Army during the American Civil War; Iraqi 36th Commando Battalion: a current Iraqi Army unit; 36th Battalion, Northumberland Fusiliers: a British Army unit; 36th Peel Battalion: a Canadian infantry regiment that existed 1866–1936.
See also 36th Division (disambiguation) 36th Brigade (disambiguation) 36th Regiment (disambiguation) 36th Squadron (disambiguation)