| Thomas Monaghan | |
| Birth Date: | 18 April 1833 |
| Death Date: | 10 November 1895 (aged 62) |
| Birth Place: | Abergavenny, Monmouthshire |
| Death Place: | Woolwich, London |
| Placeofburial: | Woolwich cemetery |
| Rank: | Sergeant-Trumpeter |
| Branch: | British Army |
| Unit: | 2nd Queen's Dragoon Guards |
| Battles: | Indian Mutiny |
| Awards: | Victoria Cross |
Thomas Monaghan VC (Irish: Tomás Ó Manacháin; 18 April 1833 - 10 November 1895) was a British recipient of the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces, during the Indian Mutiny
Monaghan was born at Abergavenny, Monmouthshire. At 25 years of age, Monaghan was a trumpeter in the 2nd Dragoon Guards (Queen's Bays), British Army during the Indian Mutiny
Monaghan and the Dragoon (Charles Anderson) were both awarded the Victoria Cross for their bravery. Monaghan eventually achieved the rank of sergeant-trumpeter. His grave is at Woolwich cemetery, London and his Victoria Cross is displayed at the Queen's Dragoon Guards Regimental Museum at Cardiff Castle, Wales.