- Category: Populated Place
- Type: Village
- Latitude/Longitude: 50°21'7"N 4°47'46"W
- Eastings/Northings: 201178, 53994
- OS Grid: SX011539
- Mapcode Local: GBR ZX.8X3B
- Mapcode Global: FRA 08V3.F9L
Location and coordinates are for the approximate centre of Trethowel within this administrative area.
Geographic features and populated places may cross administrative borders.