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.
Abererch Parish; Statistics; Area 5962 acres; Population 818 males, 964 females, total 1782
- Abererch Parish Church "A fine old Parish Church" Attendance - morning 48 + 50 scholars Service in Welsh "In consequence of my having to ride to Penrhos Chapel, at a distance of four miles from hence to perform the Afternoon service at 3 o'clock I am obliged to drop the Evening Service at Abererch during the winter months" A Pugh, Vicar
- Ebenezer, Independents Erected 1822 Attendance - morning 50 scholars, afternoon 79, evening 76 Thomas Griffith, Minister, Capel Helyg, Pwllheli
- Abererch Chapel, Calvinistic Methodist Erected 1811 Attendance - morning 56 scholars, afternoon 194, evening 104 Thos. Griffith, Diacon, Ty yn y Nant, Pwllheli
- Tyddynsion Chapel, Old Babtists Erected 1839 Attendance - morning 42 scholars, afternoon 95, evening 35 Robert Owen, Deacon, Brynaerau
- Llwyndyrus Chapel, Calvinistic Methodist Erected 1838 Attendance - morning 150, afternoon 124 scholars, evening 130 Evan Davies, Deacon, Pen y bont
- Fourcrosses Chapel, Calvinistic Methodists Erected 1815 Attendance - morning 163 scholars, afternoon 137, evening 314 William Owen, Deacon, Hendrefeinws