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