90th Division may refer to:
Infantry divisions 90th Division (1st Formation) (People's Republic of China), 1949–1950 90th Division (2nd Formation) (People's Republic of China), 1950–1952 90th Light Infantry Division, Wehrmacht, Germany 90th Guards Rifle Division, Soviet Union 90th Infantry Division (United States)
Armoured division 90th Guards Tank Division (1965–1985), Soviet Union 90th Guards Tank Division (1985–1997), Soviet Union, 1985–1992 and Russia, 1992–1997 90th Guards Tank Division (2016–present), Russia
Aviation divisions 90th Air Division, United States
See also List of military divisions by number 90th Brigade (disambiguation) 90th Regiment (disambiguation) 90th Squadron (disambiguation)