CYNON, a hamlet, joint with TU., in the parish and newly-created borough of MERTHYR-TYDVIL, county of GLAMORGAN, SOUTH WALES, 6 miles (S.) from Merthyr- Tydvil. The population is returned with the parish. This hamlet is formed by the long isthmus of elevated ground at the junction of the rivers Cynon and Tif, being bounded on the west by the former, and on the east by the latter: parallel to these run the Aberdare and Cardiff canals At the southern extremity of the hamlet the TAf is crossed by a bridge; and near the same spot an aqueduct conveys the Cardiff canal over that river and the road to Aberdare. The vale of the Cynon is well wooded and picturesque.