31st Division may refer to: 31st Division (German Empire), a unit of the Imperial German Army 31st SS Volunteer Grenadier Division, a unit of the German Army 31st Division (Imperial Japanese Army), a unit of the Imperial Japanese Army 31 Infantry Division Calabria, a unit of the Italian Army 31st Division (United Kingdom), a unit of the United Kingdom Army 31st Infantry Division (Russian Empire), a unit of the Russian Empire 21st Guards Motor Rifle Division (31st Guards Rifle Division), a unit of the Soviet Army 31st Infantry Division (United States), a unit of the United States Army Armoured divisions 31st Indian Armoured Division, a unit of British India during World War II 31st Armored Division (Israel), a reservist armored division in Israel that fought in the Six-Day War 31st Tank Division (Soviet Union), a unit of the Soviet Army Aviation divisions 31st Air Division, a unit of the United States Air Force See also 31st Group (disambiguation) 31st Brigade (disambiguation) 31st Regiment (disambiguation) 31st Battalion (disambiguation) 31st Squadron (disambiguation)