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 978 acres; Population 101 males, 87 females, total 188
- Llanmerewig Parish Church Attendance - morning 56 + 14 scholars Services in English John Lloyd, Rector
- Wainhouse, Wesleyan Methodists Dwelling house Attendance - evening 35 Charles Stephens, Steward
Church of St Llwchaiarn, Llanmerewig on the Montgomeryshire Churches Survey site