| 18th Royal Hussars (Queen Mary's Own) | |
|---|---|
 Badge of the 18th Royal Hussars | |
| Active | 1759–1821 1858–1922 |
| Country |  Kingdom of Great Britain (1759–1800) United Kingdom (1801–1922) |
| Branch |  British Army |
| Type | Cavalry |
| Role | Line Cavalry |
| Size | 1 Regiment |
| Nickname(s) | The Young 15th The Drogheda Light Horse |
| Motto(s) | Pro rege, pro lege, pro patria conamur (For King, for Law, for Country we strive) |
| Commanders | |
| Notable commanders | Field Marshal Charles Moore, 1st Marquess of Drogheda General Sir Edward Hodge |
The 18th Royal Hussars (Queen Mary's Own) was a cavalry regiment of the British Army, first formed in 1759. It saw service for two centuries, including the First World War before being amalgamated with the 13th Hussars to form the 13th/18th Royal Hussars in 1922.