Brycheiniog Tawe Nedd

Brycheiniog Tawe Nedd (Welsh for 'Brycheiniog, Tawe, [and] Neath'; listen) is a six-member constituency of the Senedd (Welsh Parliament; Welsh: Senedd Cymru) used in the 2026 Senedd election. It covers southern Powys, the north of Neath Port Talbot, and eastern Swansea.

It was proposed following the 2026 review of Senedd constituencies, and is a pairing of the two UK Parliament constituencies of Brecon, Radnor and Cwm Tawe and Neath and Swansea East. It has a Welsh-only name.