91st Regiment
# 91st Regiment

91st Regiment or 91st Infantry Regiment may refer to:

* 91st Regiment of Foot (disambiguation), several units of the British Army
* 91st Punjabis (Light Infantry), a unit of the British Indian Army
* 91st Cavalry Regiment, United States
* 91st Coast Artillery (United States)

Union Army (American Civil War):

* 91st Illinois Volunteer Infantry Regiment
* 91st Indiana Infantry Regiment
* 91st New York Volunteer Infantry Regiment
* 91st Ohio Infantry
* 91st Pennsylvania Infantry
