The Household Cavalry Mounted Regiment (HCMR) is a cavalry regiment of the British Army tasked primarily with ceremonial duties. Part of the Household Division, it is classed as a regiment of guards, and carries out mounted ceremonial duties on State and Royal occasions. The HCMR is one of two operational units that form the Household Cavalry (HCav), the other being the Household Cavalry Regiment (HCR), a formation reconnaissance regiment, with front-line combat duties.

There are 13 cavalry Regiments of the British Army each with its own unique cap badge, regimental traditions, and history. Of the currently nine regular cavalry regiments, two serve as armoured regiments, three as armoured cavalry regiments, three as light cavalry, and one as a mounted ceremonial regiment. There are also four yeomanry regiments of the Army Reserve, of these, three serve as light cavalry and one as an armoured regiment. Each yeomanry light cavalry unit has been paired with a regular unit of the same role, the armoured yeomanry unit is paired with the two regular armoured units. All except the Household Cavalry are part of the British Army's Royal Armoured Corps.