- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 50°16'47"N 4°59'52"W
- Eastings/Northings: 186500, 46500
- OS Grid: SW865465
- Mapcode Local: GBR ZJ.JJCH
- Mapcode Global: FRA 08F9.6NZ
Location and coordinates are for the approximate centre of Tresillian within this administrative area.
Geographic features and populated places may cross administrative borders.