- Category: Populated Place
- Type: Village
- Latitude/Longitude: 53°6'13"N 2°55'46"W
- Eastings/Northings: 337864, 356682
- OS Grid: SJ378566
- Mapcode Local: GBR 78.8GWZ
- Mapcode Global: WH88S.Z74Z
Location and coordinates are for the approximate centre of Trevalyn within this administrative area.
Geographic features and populated places may cross administrative borders.