- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 51°36'38"N 2°47'18"W
- Eastings/Northings: 345500, 190500
- OS Grid: ST455905
- Mapcode Local: GBR JG.9P9P
- Mapcode Global: VH7B9.MS73
Location and coordinates are for the approximate centre of Trewen within this administrative area.
Geographic features and populated places may cross administrative borders.