40th Division

40th Division or 40th Infantry Division may refer to:


 * Infantry Divisions :


 * 40th Division (German Empire), a unit of the Imperial German Army
 * 40th Division (Imperial Japanese Army), a unit of the Imperial Japanese Army
 * 40th Division (United Kingdom), a unit of the United Kingdom Army
 * 40th Infantry Division (United States), a unit of the California Army National Guard in the U.S. Army.
 * 40th Infantry Division (People's Republic of China), a unit of the PLA
 * 40th Rifle Division
 * 40th Infantry Division Cacciatori d'Africa, Italian division of World War II


 * Aviation Divisions :
 * 40th Air Division, a unit of the United States Air Force