Location and coordinates are for the approximate centre of Llanallgo within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Llanallgo, coast par., Anglesey, in NE. of co., 6 miles NE. of Llanerchymedd ry. sta., 659 ac., pop. 398; the church contains a monument to those who perished in the wreck of the Royal Charter in 1859.