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.
Llannor Parish; Statistics; Area 5553 acres; Population 536 males, 581 females, total 1117
- Llannor Parish Church Attendance - morning 82, evening 92 (Llannor with Denio - 6 services in Welsh and 2 in English) Thomas Jones, Vicar
- Rhydclafdy, Calvinistic Methodist Erected 52 years before 1800 Attendance - morning 156, afternoon 171 scholars, evening 162 Owen Williams, Elder, Penrhynydyn, nr Pwllheli
- Refail Newydd, Welsh Calvinistic Methodist Erected 1828 Attendance - morning 65, afternoon 157 scholars, evening 165 James Parry, Deacon, Penllwyn, Pwllheli
- Pentrauchaf Chapel, Calvinistic Methodist Erected 1779 Attendance - morning 152 scholars, afternoon 218, evening 189 Evan Evans, Manager, Llannerch, Pwllheli