- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°0'3"N 3°59'59"W
- Eastings/Northings: 265901, 346715
- OS Grid: SH659467
- Mapcode Local: GBR 5W.GT14
- Mapcode Global: WH558.JTLT
Location and coordinates are for the approximate centre of Llynnau Diffwys within this administrative area.
Geographic features and populated places may cross administrative borders.