"LLANDEGVETH, a parish in the lower division of the hundred of Usk, county Monmouth, 3 miles N. of Caerlon, its post town, 4 S.W. of Usk, and 5 from Pont-y-pool. A tributary of the river Usk flows through the parish, which is of small extent, and wholly agricultural. The living is a rectory in the diocese of Llandaff, value £164. The church is dedicated to St. Thomas [*but the church is actually dedicated to St Tegfedd]. There are charities of about £2 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.
Llandegveth Parish; Statistics; Area 789 acres; Population 64 males, 50 females, total 114
Llandegveth Parish Church Attendance - morning 40 + 10 scholars 1 service in English P A Williams, Rector, Caerleon
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 ST338956 (Lat/Lon: 51.655228, -2.958386), Llandegfedd which are provided by: