In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Llanarmon Dyffryn Ceiriog like this:
LLANARMON-DYFFRYN-CEIRIOG, a village and a parish in the district of Corwen and county of Denbigh. The village stands on the river Ceiriog, 9 miles WNW of Oswestry r. station; and has a post office, under Llangollen, and a fair on 13 Aug.The parish contains the townships of Llowran, and Llowarch, and comprises 6,557 acres. ...
Real property, £2,801. Pop., 315. Houses, 60. The property is not much divided. Traces exist of a double-ditched camp. The living is a rectory in the diocese of St. Asaph. Valne, £250.* Patron, the Bishop of Llandaff. The church was recently in disrepair.
Llanarmon Dyffryn Ceiriog is now part of Wrexham district. Click here for graphs and data of how Wrexham has changed over two centuries. For statistics about Llanarmon Dyffryn Ceiriog itself, go to Units and Statistics.
GB Historical GIS / University of Portsmouth, History of Llanarmon Dyffryn Ceiriog, in Wrexham and Denbighshire | Map and description, A Vision of Britain through Time.
Date accessed: 28th March 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time , and maybe some references to other places called " Llanarmon Dyffryn Ceiriog ".