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 16929 acres; Population 565 males, 514 females, total 1079
- Llangadfan Parish Church Attendance - usual - morning 75 + 20 scholars, afternoon 25 scholars, evening 80 Services in Welsh Informant; Griffith Howell, Registrar
- Rehoboth, Calvinistic Methodist Erected 1821 Attendance - morning 31, afternoon 65, evening 40 Robert Jones, Elder, Carno Office
- Siloh, Calvinistic Methodist Erected 1830 Attendance - morning 31, afternoon 41 scholars, evening 60 Robert Lloyd, Manager, Llwydriaeth Park, Carno Office
- Pontcadfan, Wesleyan Methodist Erected 1823 Attendance - morning 39, evening 39 William Powell, Wesleyan Minister
- Voel Chapel, Independent Erected 1806 Attendance - morning 32 scholars, afternoon 123 Edward Roberts, Independent Minister