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.
Penrhoslligwy Parish; Statistics; Area 2894 acres; Population 271 males, 282 females, total 553
- Penrhoslligwy Parish Church (Diocese of Bangor) Attendance - average- morning 12/18, afternoon 80/90 Service in Welsh "The two dissenting schools being open on Sunday mornings merely a few old people (neighbours) attend morning service" Richard Williams Mason, M.A, Perpetual Curate
- Ysgoldy'r Mynydd, Calvinistic Methodist Erected 1822 Attendance - usual - 40 scholars, afternoon 60, evening 50 Informant; John Roberts, Cefn Carrog
- Salem, Calvinistic Methodists Erected 1838 Attendance - morning 56 scholars, afternoon 107, evening 57 Richard Williams, Elder, Bodafon