27th Battalion may refer to:
27th Battalion (Australia), a unit of the Australian Army 2/27th Battalion (Australia), a unit of the Australian Army 27th Battalion (City of Winnipeg), CEF, a unit of the Canadian Army 27th Jäger Battalion (Finland), a unit of the German Army 1915–1918 consisted mainly of volunteers from Finland 27e bataillon de chasseurs alpins, a unit of the French Army 27 Infantry Battalion (Ireland), a unit of the Irish Army 27th Machine-Gun Battalion (New Zealand), a unit of the 2nd New Zealand Division during the Second World War 27th Battalion Virginia Partisan Rangers, a cavalry unit in the Confederate States Army during the American Civil War 27th Engineer Battalion (United States), a unit of the United States Army
See also 27th Army (disambiguation) 27th Brigade (disambiguation) XXVII Corps (disambiguation) 27th Division (disambiguation) 27th Regiment (disambiguation) 27 Squadron (disambiguation)