Trefriw is a village in Conwy county borough, Wales. It lies on the river Conwy in north Wales, lying a few miles south of the site of the Roman fort of Canovium, sited at Caerhun.
Trefriw lies on the edge of Snowdonia, on the B5106 road to the north-west of Llanrwst, and about 4½ miles north of Betws-y-coed by road. It is located on the western slopes of the glaciated Conwy valley, below the ridge of Cefn Cyfarwydd, the village having been largely built in a semicircle at the point where the river Crafnant flows from its hanging valley to join the river Conwy. The river Crafnant still provides power for the woollen mill, and in the past provided power for a number of other industries based along its banks, such as a forge which provided quarry tools.