Church and chapel data from The Religious census of 1851 : A Calendar of the returns relating to Wales, Vol 1, South Wales. Ed. by I.G Jones, & D. Williams. UWP, Cardiff, 1976. The names given towards the end of each entry are those of the informants. Check with Gwent RO to see what extant records are held, and possible names of chapels/churches established after 1851.
Marshfield Parish; Statistics; Area 1270 acres; Population 271 males, 255 females, total 526
- Marshfield Parish Church Attendance - morning 26 + 9 scholars 1 service, Welsh and English alternately, by the curate Samuel Evans, Curate
- Salem Particular Baptist Erected 1807 Attendance - morning 350 + 90 scholars; evening 640 + 56 scholars John Davies, Secretary, Castletown
- Sion Calvinistic Methodist Erected 1836 Attendance - morning 18 + 15 scholars, evening 50 + 12 scholars Edward Cosslett, Steward, Castletown
- Loft near The Mill, Castletown, Wesleyan Building erected before 1800; not used exclusively as a place of worship Attendance (average) morning 24, afternoon 20, evening 60 Thomas Maule, Steward, near the coach and horses, Castletown