Church and chapel data from The Religious census of 1851 : A Calendar of the returns relating to Wales, Vol 11, North Wales. Ed. by Ieuan Gwynedd Jones, UWP, 1981. The names given towards the end of each entry are those of the informants.
Parish statistics; Area 4000 acres; Population 157 males, 151 females, total 308
- Hirnant Parish Church Attendance - morning 62 + 16 scholars, afternoon 35 + 20 scholars Evening service in Welsh Wm Edwd Williams, Rector
- *Pen Nebo, Wesleyan Methodist Erected 1833 Attendance - morning 42 scholars, afternoon 60, evening 53 John Ashford, Member
- *Pen Nebo, Wesleyan (See above return) Erected 1831 Attendance - morning 50 scholars, afternoon 74, evening 60 Rich. Prichard, Minister, Llanfyllin
- Hebron Chapel, Calvinistic Methodists Erected 1835 Attendance - morning 30, afternoon 45, evening 40 (No signature) Head Elder
Church of St Illog, Hirnant on the Montgomeryshire Churches Survey site