The King's Regiment, officially abbreviated as KINGS, was an infantry regiment of the British Army, part of the King's Division. It was formed on 1 September 1958 by the amalgamation of the King's Regiment (Liverpool) which had been raised in 1685 and the Manchester Regiment which traced its history to 1758. In existence for almost 50 years, the regular battalion, 1 KINGS, served in Kenya, Kuwait, British Guiana (Guyana), West Germany, Northern Ireland, the Falkland Islands, Cyprus, and Iraq. Between 1972 and 1990, 15 Kingsmen died during military operations in Northern Ireland during a violent period in the province's history known as "The Troubles".

The King's Regiment (Liverpool) was one of the oldest line infantry regiments of the British Army, having been formed in 1685 and numbered as the 8th (The King's) Regiment of Foot in 1751. Unlike most British Army infantry regiments, which were associated with a county, the King's represented the city of Liverpool, one of only four regiments affiliated to a city in the British Army. After 273 years of continuous existence, the regiment was amalgamated with the Manchester Regiment in 1958 to form the King's Regiment (Liverpool and Manchester), which was later amalgamated with the King's Own Royal Border Regiment and the Queen's Lancashire Regiment to form the present Duke of Lancaster's Regiment (King's, Lancashire and Border).