Location and coordinates are for the approximate centre of Tregynon within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Tregynon, par. and vil., Montgomeryshire, 5 miles N. of Newtown, 6760 ac., pop. 708; P.O.