- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 50°39'30"N 3°34'43"W
- Eastings/Northings: 288500, 85500
- OS Grid: SX885855
- Mapcode Local: GBR QS.3XVG
- Mapcode Global: FRA 37DB.FL6
Location and coordinates are for the approximate centre of Underdown within this administrative area.
Geographic features and populated places may cross administrative borders.