The 100th Regiment of Foot, or the Loyal Lincolnshire Regiment, was an infantry regiment of the British Army, formed in 1780 and disbanded in 1785. The Loyal Lincolnshires were reformed in 1794 as the 123rd Regiment of Foot (Loyal Lincolnshire) and was again disbanded in 1796. The "Loyal Lincolnshire" title was later reused by the 123rd Foot, raised in 1794.