The Royal Scots Greys was a cavalry regiment of the British Army from 1707 until 1971, when they amalgamated with the 3rd Carabiniers Prince of Wales's Dragoon Guards to form The Royal Scots Dragoon Guards Carabiniers and Greys.

The regiment's history began in 1678, when three independent troops of Scots Dragoons were raised.

In 1681, these troops were regimented to form The Royal Regiment of Scots Dragoons, numbered the 4th Dragoons in 1694.