The Loyal Regiment (North Lancashire) (until 1921 known as the Loyal North Lancashire Regiment) was a line infantry regiment of the British Army that was in existence from 1881 to 1970. In 1970, the regiment was amalgamated with the Lancashire Regiment to form the Queen's Lancashire Regiment which was, in 2006, amalgamated with the King's Own Royal Border Regiment and the King's Regiment (Manchester and Liverpool) to form the Duke of Lancaster Regiment (King's, Lancashire and Border).

The Duke of Lancaster's Regiment (LANCS) is an infantry regiment of the line within the British Army, part of the King's Division. Headquartered in Preston, it recruits throughout the North West of England. The title of Duke of Lancaster merged with the Crown on the accession of Henry V in 1413 and remains dormant, subject to any future revival. Customarily, however, the Sovereign is referred to as the Duke of Lancaster within Lancashire and in relation to the Duchy of Lancaster, and is the regiment's Colonel in Chief. The Duke of Lancaster's Regiment is the county regiment for Cumbria, Lancashire, Greater Manchester, Merseyside and the Isle of Man, and as such, recruits mainly from these areas.