The Church of St Teilo is the parish church of Llantilio Pertholey, Monmouthshire, Wales.

"An unusually large and varied church",[1] it is a Grade I listed building as of 1 September 1956[2] The church is thirteenth century in origin with significant additions in the sixteenth century, a major restoration in 1890 and further minor restoration in the twentieth century.

[3] The tower is of the early fourteenth century and the aisle of slightly later date.

[1] Around the chancel are three chantry chapels, the church's "most memorable" features.

[4] Services are held at the church on Wednesdays, Fridays and Sundays.