Location and coordinates are for the approximate centre of Rhoscolyn within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Rhoscolyn, par., Anglesey, in SE. of Holyhead Island, 4½ miles SE. of Holyhead, 2580 ac. (385 water), pop. 442.