Six regiments of the British Army have been numbered the 99th Regiment of Foot:

, raised in 1761 99th Regiment of Foot (Jamaica Regiment), raised in 1780 99th Regiment of Foot (1794), raised in 1794 , raised in 1804 and renumbered as the 98th in 1816 99th Regiment of Foot (Prince Regent's County of Dublin Regiment), renumbered from the 100th in 1816 99th Duke of Edinburgh's (Lanarkshire) Regiment of Foot, raised in 1824