 Llanarmon Dyffryn Ceiriog is situated in the upper Ceiriog Valley, which is known both for its high landscape value, being extremely scenic and dominated by traditional agricultural use, and as a strong centre of Welsh culture.In the 2001 census of neighbourhood Wrexham 019B, containing the village, 55.1% of residents were found to have knowledge of the Welsh language, against 28.4% in Wales as a whole.From the mid-16th century until 1974, Llanarmon Dyffryn Ceiriog was governed by the then administrative county of Denbighshire, which was divided into various rural districts.