- Category: Populated Place
- Type: Suburban Area
- Latitude/Longitude: 50°13'0"N 5°18'54"W
- Eastings/Northings: 163590, 40445
- OS Grid: SW635404
- Mapcode Local: GBR FX83.D43
- Mapcode Global: VH12H.TTF8
Location and coordinates are for the approximate centre of Treswithian within this administrative area.
Geographic features and populated places may cross administrative borders.