45th Division

45th Division may refer to:

Infantry divisions

 * 45th Reserve Division (German Empire)
 * 45th Landwehr Division (German Empire)
 * 45th Infantry Division (Wehrmacht)
 * 45th Rifle Division (Soviet Union)
 * 45th Infantry Division (United Kingdom)
 * 45th Infantry Division (United States)
 * 45th Infantry Division (Poland)
 * 45th Division (Spain)

Aviation divisions

 * 45th Air Division (United States)