- Category: Populated Place
- Type: Suburban Area
- Latitude/Longitude: 51°51'10"N 4°17'25"W
- Eastings/Northings: 242354, 219626
- OS Grid: SN423196
- Mapcode Local: GBR DH.TDGM
- Mapcode Global: VH3LH.LP7F
Location and coordinates are for the approximate centre of Tre-gynwr within this administrative area.
Geographic features and populated places may cross administrative borders.