The Welsh village of Dyffryn Cellwen is mostly within the county of West Glamorgan and has a population of approximately 1,100.
Most of Dyffryn Cellwen is governed by Castell-nedd Port Talbot - Neath Port Talbot council with the remainder being in the area of Powys - Powys council
Most of Dyffryn Cellwen is policed by South Wales Police with the remainder being policed by Dyfed-Powys Police
The largest Parliamentary Constituency in Dyffryn Cellwen is Neath (75.00%) with the remainder being in Brecon and Radnorshire (25.00%)
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