81st Regiment may refer to:
- 81st Regiment of Foot (Aberdeenshire Highland Regiment), a unit of the British Army, 1777–1783
- 81st Regiment of Foot (Loyal Lincoln Volunteers), a unit of the British Army
- 81st Infantry Regiment (Philippine Commonwealth Army), a unit of the Philippine Commonwealth Army during the Second World War from 1942 to 1946.
- 81st Infantry Regiment (Imperial Japanese Army), a unit of the Japanese Army
- 81st Assault Aviation Regiment, later Fighter-Bomber regiment, an aviation unit of the Yugoslav Air Force
- American Civil War
- 81st Illinois Volunteer Infantry Regiment, a unit of the Union (Northern) Army
- 81st Indiana Infantry Regiment, a unit of the Union (Northern) Army
- 81st New York Volunteer Infantry, a unit of the Union (Northern) Army
- 81st Ohio Infantry, a unit of the Union (Northern) Army
- 81st Pennsylvania Infantry, a unit of the Union (Northern) Army
See also
Topics referred to by the same termThis disambiguation page lists articles about military units and formations which are associated with the same title.If an internal link referred you to this page, you may wish to change the link to point directly to the intended article. Category: