Bettws Cedewain, also known as Bettws Cedewen, is a small village and community in Montgomeryshire, Powys, Wales. It lies in a sheltered valley on the banks of the River Bechan, some 3 miles north of Newtown, on the B4389 road. The community is known as Betws Cedewain, and includes the hamlets of Highgate and Brooks. A wooden motte-and-bailey castle appears to have existed there at one time.