19th Battalion

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