| Church of St Tysoi, Llansoy | |
| Denomination: | Church in Wales |
| Diocese: | Monmouth |
| Style: | Perdendicular |
| Years Built: | 14th/15th century |
| Status: | Grade I listed |
| Location: | Monmouth, Monmouthshire |
| Country: | Wales |
| Coordinates: | 51.7175°N -2.8088°W |
The Church of St Tysoi, is the parish church of Llansoy, Monmouthshire, Wales and sits to the south of the village. It is in the Perpendicular style and is a Grade I listed building as of 19 August 1955.
The church is medieval in origin, of Old Red Sandstone. The tower may be "no earlier than the early nineteenth century."* The church was lightly restored in the nineteenth century including work by John Pollard Seddon.
The interior has a fifteenth-century barrel roof and contemporary fittings. It also has some notable stained glass windows of the nineteen twenties and of the later twentieth century, including a "brilliantly coloured" "Genesis" window by Geoffrey Robinson.