91st (Argyllshire Highlanders) Regiment of Foot

91st Regiment of Foot
Active1794–1881
Country Kingdom of Great Britain (1794–1800)
 United Kingdom (1801–1881)
Branch British Army
TypeLine Infantry
SizeOne battalion (two battalions 1804–1815)
Motto(s)Ne Obliviscaris (Do not forget)
EngagementsFrench Revolutionary Wars
Napoleonic Wars

The 91st (Argyllshire Highlanders) Regiment of Foot was a Line Regiment of the British Army, raised in 1794. Under the Childers Reforms it amalgamated with the 93rd (Sutherland Highlanders) Regiment of Foot to form the Argyll and Sutherland Highlanders in 1881.