Penmachno is a village in the isolated upland Machno valley, 4 miles (6 km) south of Betws-y-Coed in the county of Conwy, North Wales. The B4406 road runs through part of the village. The village is at the confluence of the Glasgwm and Machno rivers. It has a five-arched, stone bridge dating from 1785. The village has been referred to as Pennant Machno, Llandudclyd and Llan dutchyd in historical sources.