- Category: Populated Place
- Type: Village
- Latitude/Longitude: 50°21'5"N 4°45'3"W
- Eastings/Northings: 204400, 53794
- OS Grid: SX044537
- Mapcode Local: GBR N1.W9GH
- Mapcode Global: FRA 08Y3.LYN
Location and coordinates are for the approximate centre of Tregrehan Mills within this administrative area.
Geographic features and populated places may cross administrative borders.