"TROSTREY, a parish in the upper division of Usk hundred, county Monmouth, 2½ miles N.W. of Usk, its post town, and 6 from Ponty-Pool. The village is situated on the road from Usk to Abergavenny, near the eastern bank of the river Usk. Salmon are caught by a weir on the river, which rose 22 feet above the usual level on the 16th February, 1795. The living is a perpetual curacy in the diocese of Llandaff, value £72. The church is dedicated to St. David. There are a few small charities."
[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.
Trostrey Parish; Statistics; Area 1255 acres; Population 79 males, 97 females, total 176
Trostrey Parish Church Attendance - general congregation 120/130 1 service in English S W Gardiner, Perpetual Curate
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 SO360043 (Lat/Lon: 51.733698, -2.928186), Trostre / Trostrey which are provided by: