The parish of Churchstoke is bisected by Offa's Dyke. Part of the parish lies in England and part of it in Wales, but the Dyke delineates only a segment of the boundary between England and Wales, which boundary also separates the counties of Powys and Shropshire. In this region of the Welsh Marches, there is a significant incursion of Wales east of Offa's Dyke, an area which includes Corndon Hill and the Churchstoke valley. The borderland parish of Church Stoke comprises nine areas, known as townships, one of which is Bacheldre, which lay in the former county of Montgomeryshire.