"NEWCHURCH, a parish in the upper division of Caldicott hundred, county Monmouth, 5 miles N.W. of Chepstow, its post town, and 12 from Monmouth. It is in two divisions, E. and W., and includes the chapelry of Devandean. The village is considerable, but chiefly agricultural. The living is a perpetual curacy* in the diocese of Llandaff, value £166. There is also a chapel-of-ease at Devandean. The parochial charities produce about £8 per annum." [Description(s) from The National Gazetteer of Great Britain and Ireland (1868)
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.
Newchurch Parish consisting of East Division and West Division; Statistics; Area 5434 acres; Population 382 males, 365 females, total 747
Devanden Chapel, Church of England Consecrated 1837 as an additional chapel to the Mother Church Attendance - morning 39 scholars, afternoon 70 + 39 scholars, evening 59 2 services in English David Jones, Off. Ministr
Glynn Chapel, Wesleyan Erected 1824 Attendance - afternoon 35 "One service at half two every Sabath and once in three weeks on Wednesday at 7 in the evening" James White, Steward, Glen Vale
Mount Ephraim, Wesleyan Erected 1841 Attendance - morning 23 (alternately afternoons) Thomas Thomas, Local Preacher, Middle St
Newchurch Parish Church Attendance - (average) morning 30, afternoon 50 (alternately?) 1 service in English Joseph Camplin Prosser, Vicar
Family Search have an interactive map called "England and Wales Jurisdictions 1851" showing parish (and other) boundaries with optional background maps such as Ordnance Survey. There is also a Search facility, do read the guidance notes to get maximum benefit from this useful resource. See here for further background information to assist in the interpretation of this data
Kain, R.J.P., Oliver, R.R., Historic Parishes of England and Wales: an Electronic Map of Boundaries before 1850 with a Gazetteer and Metadata [computer file]. Colchester, Essex: History Data Service, UK Data Archive [distributor], 17 May 2001. SN: 4348. Here is a gazetteer/finding aid plus a set of overview maps to accurately identify the position of parishes within the county.
You can see maps centred on OS grid reference ST454975 (Lat/Lon: 51.673603, -2.790984), Eglwys Newydd Ar Y Cefn Yr / Newchurch which are provided by: