54th Regiment of Foot was the designation of the 43rd (Monmouthshire) Regiment of Foot prior to 1751.

54th Regiment of Foot may also refer to:

• 43rd (Monmouthshire) Regiment of Foot, aka 54th Regiment of Foot, numbered as the 54th Foot in 1747 and renumbered as the 43rd in 1751
• 52nd (Oxfordshire) Regiment of Foot, aka 54th Regiment of Foot, raised in 1755 and renumbered as the 52nd in 1756

• 54th Infantry (disambiguation)