The King's Own Royal Border Regiment was an infantry regiment of the British Army, part of the King's Division. It was formed in 1959 through the amalgamation of two other regiments:

·         The King's Own Royal Regiment (Lancaster)

·         The Border Regiment

In 2004, as part of the restructuring of the infantry, it was announced that the King's Own Royal Border Regiment would amalgamate with the King's Regiment and the Queen's Lancashire Regiment to form the new Duke of Lancaster's Regiment (King's Lancashire and Border). The new regiment was formed on 1 July 2006, with the KORBR forming the 3rd Battalion.