Glynneath, also spelt Glyn-neath and Glyn Neath, is a small town, community and electoral ward lying on the River Neath in the county borough of Neath Port Talbot, Wales. It was formerly in the historic county of Glamorgan. Glynneath ward covers only part of the community, with some 840 electors included in the neighbouring ward of Blaengwrach.

River Neath is a river in south Wales running south west from the point at which its headwaters arising in the Brecon Beacons National Park converge to its mouth at Baglan Bay below Briton Ferry on the east side of Swansea Bay.