Sarn is a small village in Powys, Wales. The village lies on the A489 road 6.4 miles east of Newtown. There is a bus service through the village, with buses to Newtown, Churchstoke and Montgomery. Less than a mile to the west is the smaller settlement of Llancowrid, also on the A489, at grid reference SO196908. The hamlets of City and Bachaethlon are 0.75 miles from Sarn, on the minor road up to the Kerry Ridgeway.