In military terms, 100th Division or 100th Infantry Division may refer to:
Infantry divisions 100th Jäger Division, Wehrmacht, Germany, also known as the 100th Light Infantry Division 100th Division (Imperial Japanese Army) 100th Guards Rifle Division, Soviet Union 100th Guards Training Motor Rifle Division, Soviet Union 100th Motor Rifle Division, Soviet Union 100th Rifle Division, Soviet Union 100th Division (United States)
Aviation divisions 100th Air Division, United States
Other divisions 100th Operational Division, Russia/Soviet Union
See also List of military divisions by number 100th Brigade (disambiguation) 100th Regiment (disambiguation) 100th Squadron (disambiguation) 100th (disambiguation)