- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°7'26"N 4°8'8"W
- Eastings/Northings: 257186, 360656
- OS Grid: SH571606
- Mapcode Local: GBR 5P.79T9
- Mapcode Global: WH54M.FRV0
Location and coordinates are for the approximate centre of Llyn Tomos Lewis within this administrative area.
Geographic features and populated places may cross administrative borders.