19th Battalion may refer to:
19th Battalion (Australia), a World War I ANZAC battalion 2/19th Battalion (Australia), a World War II Australian infantry battalion 19th Battalion (New Zealand), a World War II infantry battalion 19th (Central Ontario) Battalion, CEF, a World War I battalion for the Canadian Corps 19th Battalion (United States Marine Corps), a battalion in the Fleet Marine Corps Reserve 1st/19th Battalion, Royal New South Wales Regiment, a unit of the Australian Army Reserve
See also 19th Corps (disambiguation) 19th Division (disambiguation) 19th Brigade (disambiguation) 19th Regiment (disambiguation) 19th Group (disambiguation) 19th Squadron (disambiguation)