| 3rd Cavalry Brigade | |
|---|---|
| Active | 1815 1899–1902 1914– |
| Country |  United Kingdom |
| Branch |  British Army |
| Type | Cavalry |
| Size | Brigade |
| Part of | 2nd Cavalry Division (World War I) |
| Engagements | Napoleonic Wars |
| Commanders | |
| Notable commanders | Wilhelm von Dörnberg Hubert Gough |
The 3rd Cavalry Brigade was a cavalry brigade of the British Army. It served in the Napoleonic Wars (notably at the Battle of Waterloo), in the Boer War, and in the First World War on the Western Front where it was initially assigned to The Cavalry Division before spending most of the war with the 2nd Cavalry Division.