In military terms, 89th Division or 89th Infantry Division may refer to:
89th Division (People's Republic of China) 89th Infantry Division (German Empire) 89th Infantry Division (Wehrmacht), Germany 89th Division (Imperial Japanese Army) 89th Guards Rifle Division, Soviet Union 89th Motor Rifle Division, Soviet Union 89th Rifle Division, Soviet Union 89th Infantry Division (United States)
See also List of military divisions by number 89th Brigade (disambiguation) 89th Regiment (disambiguation) 89th Squadron (disambiguation)