| Usk Castle | |
|---|---|
Castell Brynbuga | |
| Usk, Monmouthshire, United Kingdom | |
 Garrison Tower from the inner ward | |
  Usk Castle | |
| Coordinates | 51°42′18″N 2°54′12″W / 51.7051°N 2.9033°W |
| Type | Castle |
| Site information | |
| Condition | Ruined |
| Site history | |
| Built | 1120 |
| Demolished | 1536 (partially) |
| Events | Battle of Usk |
Listed Building – Grade I | |
| Official name | Usk Castle and precincts |
| Designated | 16 February 1953 |
| Reference no. | 2127 |
Usk Castle (Welsh: Castell Brynbuga) is a castle site in the town of Usk in central Monmouthshire, south east Wales, United Kingdom. It was listed Grade I on 16 February 1953. Within the castle, and incorporating parts of its gatehouse, stands Castle House, a Grade I listed building in its own right.