"LLANSOY, a parish in the upper division of the hundred of Ragland, county Monmouth, 7 miles N.W. of Chepstow. Usk is its post town. It is a small agricultural place. The living is a rectory* in the diocese of Llandaff, value £170. The charities amount-to about £14 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.
Llansoy Parish; Statistics; Area 1410 acres; Population 86 males, 80 females, total 166
Llansoy Parish Church Attendance - morning 26 + 11 scholars, afternoon 58 + 13 scholars 1 service in English "There is no other place of worship in the parish" Richard Macdonnell Evanson, Rector
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 SO442024 (Lat/Lon: 51.717494, -2.809153), Llan-soe / Llansoy which are provided by: