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.
Llanfaelog Parochial Chapelry; Statistics; Area 2732 acres; Population 399 males, 401 females, total 800
- Llanfaelog Parochial Chapelry Erected 1848 Attendance - usual morning 60 Informant; Owen Williams
- Paran, Calvinistic Erected 1828 Attendance - morning 79 scholars, afternoon 93, evening 80 Thomas Owen, Manager, Rhosneigr
- Bryn Du, Calvinistic Methodist Erected 1795 (old), 1814 (present) Attendance - morning 205, afternoon 155 scholars, evening 239 Owen Williams, Elder, Neuadd
- Rehoboth, Independent Erected 1827 Attendance - morning 34 scholars, afternoon 75, evening 51 W Morris, Minister, Brynwran
- Pencornisiog, Wesleyan Methodist Erected 1823 Attendance - (average) morning 41 scholars, afternoon 60 + 12 scholars, evening 65 + 17 scholars William Lloyd, Steward