The Royal Gibraltar Regiment is the home defence unit for the British overseas territory of Gibraltar. It was formed in 1958 from the Gibraltar Defence Force as an infantry unit, with an integrated artillery troop.

Initially a reserve force, on the withdrawal of the British Army garrison from the territory in 1991, it was placed on the British Army's regular establishment and attached to British Forces Gibraltar. It is formed as a standard light infantry battalion with a Headquarters Company and three rifle companies. Of these, two are made up of regular soldiers and the other is a Territorial Army unit. HQ Company includes an artillery troop, equipped with the L118 Light Gun.