- Category: Populated Place
- Type: Village
- Latitude/Longitude: 50°27'23"N 5°1'48"W
- Eastings/Northings: 185003, 66224
- OS Grid: SW850662
- Mapcode Local: GBR ZG.V7W4
- Mapcode Global: FRA 07CV.647
Location and coordinates are for the approximate centre of Trevarrian within this administrative area.
Geographic features and populated places may cross administrative borders.