Llansilin is a village in the county of Powys, Mid Wales. It lies on the border between Wales and England, between Moelfre to the west, Oswestry to the east, Llanyblodwel to the south east and Cefncanol to the north east.
Llansilin sits to the south of the Berwyn Range of mountains between the Afon Cynllaith, to the east, and the hill of Gyrn moelfre (523m) to the west.
Llansilin Church is a double-naved church dedicated to St Silin. Much of the church is in the Perpendicular style and dates back to the 15th century but the remains of a 13th century cruciform building are still visible. Its tower is much later, constructed in 1832 and perhaps the only medieval fittings are an early cross-incised altar stone and some of the roof beams. There is a good range of 17th century and 18th century wooden furnishings including a dug-out chest, a pillar poorbox, an altar table, a font cover, as well as the west gallery.