| Unit Name: | 20th Light Dragoons |
| Dates: | 1792–1818 |
| Country: |  United Kingdom |
| Branch: | British Army |
| Type: | Cavalry |
| Role: | Line Cavalry |
| Size: | One Regiment |
The 20th Regiment of Light Dragoons was a cavalry regiment of the British Army.
The regiment was raised as the 20th (Jamaica) Regiment of (Light) Dragoons in 1792;[1] it was deployed to Jamaica in 1795 during the Second Maroon War.[2] The regiment saw action at the Battle of Blaauwberg in January 1806 during the second invasion of the Cape Colony,[3] and later at the Battle of Montevideo in February 1807 during the British invasions of the River Plate.[4] The 3rd Squadron was the sole cavalry detachment present in the Alexandria expedition later that year.[5] It also fought at the Battle of Rolica and at the Battle of Vimeiro in August 1808 during the Peninsular War.[1] In 1805 its title was simplified again to the 20th Regiment of (Light) Dragoons; it was disbanded in 1818.[1]