"CHAPEL HILL, a parish in the upper division of the hundred of Ragland, in the county of Monmouth, 4 miles N. of Chepstow, its post and railway town. It is situated on the river Wye. In the vicinity is the celebrated Tintern Abbey, which was founded by Walter de Clare in 1141. The inhabitants are chiefly iron-workers and agriculturists. The living is a perpetual curacy in the diocese of Llandaff, value £60, in the patronage of the Duke of Beaufort. The charities produce about £63 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 built after 1851.
Chapel Hill Parish; Statistics; Area 820 acres; Population 265 males, 280 females, total 545
Chapel Hill Parish Church - Attendance - morning 50, afternoon 50 2 services in English Informant Chas Davis
Wesleyan Chapel - Erected 1820 Attendance - morning 8, evening 60 Henry Richard, Society Steward (footnote says this is wrongly listed under Chapel Hill parish but actual parish indicated was 'Tintern Abbey Parish'. However Tintern Abbey itself IS in Chapel Hill parish))
Bible Christians - Erected before 1800 (i.e a dwelling house) Attendance - morning 9, afternoon 14, evening 29 "Near this place of worship there are residing 68 persons and 42 children upwards of a mile and a quarter from the Parish Church and in consequence of having no chapel, we as a religious body of people have no Sabbath School - we have had preaching in the neighbourhood about 25 years and should have built a chapel but could not obtain a site of land but still continue our services in a dwelling house " Thomas Highley, Steward
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 ST526998 (Lat/Lon: 51.694936, -2.687184), Chapel Hill which are provided by: