166th Division may refer to:
166th Division (1st Formation) (People's Republic of China), 1948–1949 166th Division (2nd Formation) (People's Republic of China), 1951–1952 166th Infantry Division (Wehrmacht), Germany 166th Rifle Division, Soviet Union
See also List of military divisions by number 166th Brigade (disambiguation) 166th Regiment (disambiguation) 166th Squadron (disambiguation) 166th (disambiguation)