42nd Division or 42nd Infantry Division may refer to:
Infantry divisions
- 42. Home Guard Infantry Division, a unit of the Austro-Hungarian Army during World War I.
- 42nd Division (German Empire), a unit of the Imperial German Army
- 42nd (East Lancashire) Division, a unit of the British Army
- 42nd Infantry Division (United States), a unit of the United States Army's New York Army National Guard
- 42nd Rifle Division (Soviet Union)
- 42nd Guards Motor Rifle Division, currently a formation of the Russian Ground Forces
- 42nd Division (Imperial Japanese Army), a unit of the Imperial Japanese Army during WW2
- 42nd Division (Spain)
Armoured divisions
- 42nd Armoured Division (United Kingdom), a unit of the British Army
Aviation divisions
- 42d Air Division, a unit of the United States Air Force
See also
- 42nd Group (disambiguation)
- 42nd Brigade (disambiguation)
- 42nd Regiment (disambiguation)
- 42nd Battalion (disambiguation)
- 42nd Squadron (disambiguation)