| Hertfordshire Yeomanry | |
|---|---|
 | |
| Active | 1794–1824 1831–2014 |
| Country |  Kingdom of Great Britain (1794–1800) United Kingdom (1801–2014) |
| Branch |  Territorial Army |
| Type | Yeomanry |
| Role | Boer War Yeomanry World War I Yeomanry World War II Artillery Postwar Artillery |
| Size | Boer War One Regiment World War I Three Regiments World War II Three Regiments Postwar Part of one Battery |
| Engagements | Second Boer War World War I |
| Battle honours | See Battle Honours below |
The Hertfordshire Yeomanry was a Yeomanry Cavalry regiment of the British Army that could trace its formation to the late 18th century. First seeing mounted service in the Second Boer War and World War I, it subsequently converted to artillery. Three regiments saw service in World War II, one of which was captured at the fall of Singapore. It continued through various postwar amalgamations and its lineage was maintained by 201 (Hertfordshire and Bedfordshire Yeomanry) Battery, 100th (Yeomanry) Regiment Royal Artillery until that unit was placed in suspended animation in 2014.