91st Division

In military terms, 91st Division or 91st Infantry Division may refer to:

Infantry divisions:
 * 91st Infantry Division (German Empire)
 * 91st Infantry Division (Wehrmacht)
 * 91st Division (Israel)
 * 91st Division (Imperial Japanese Army)
 * 91st Division (Philippines)


 * 91st Division (United States)
 * 91st Rifle Division, Soviet Union
 * 91st Motor Rifle Division, Soviet Union

Aviation divisions:
 * 91st Air Division, United States