Location and coordinates are for the approximate centre of Llanwyddelan within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Llanwyddelan, par., Montgomeryshire, on river Rhiw, 4 miles SW. of Llanfair, 3784 ac., pop. 385.