"MAGOR, a parish in the lower division of the hundred of Caldicott, county Monmouth, 7 miles E. of Newport, and 6 miles S.E. of Caerleon, its post town. It is situated on the coast of the Bristol Channel, and has a station on the South Wales railway. The township includes the chapelry of Redwick. Petty sessions are held in the village, which is a small agricultural place. The living is a vicarage with Redwick, in the diocese of Llandaff, value £285. The church is dedicated to St. Mary. The charities produce about £3 per annum. There is a place of worship for Baptists, also a National school."
[Description(s) from The National Gazetteer of Great Britain and Ireland (1868)
Jones, Malcolm. Caldicot and the villages of the Moor in old photographs : including the villages of Portskewett, Sudbrook, Rogiet, Undy, Magor and Redwick. Volume 1. Abertillery : Old Bakehouse, 1995. 128p.
Kennedy, Dina. A den of thieves and murderers?: Magor in the 1530s. Gwent Local History vol 87 1999 Welsh Journals Online
Kennedy, Dina. Who was Cadwaladr? : a problem in the early history of Magor. Gwent Local History 82 1997 Welsh Journals Online
Lawler, Martin. Investigations at Barland's Farm, Magor, 1993. Archaeology in the Severn Estuary (1993), p. 109-12.
Lewis, C J. "The Cathedral of the Moors" : St Mary's Church, Magor. Newport] : [C. J. Lewis], .
Locock, Martin. Further late prehistoric features on the foreshore at Chapeltump, Magor, Monmouthshire : Chapeltump II and the Upton Trackway. Studia Celtica. Vol. 34 (2000), p. 17-48 .
Magor and St Mellons Rural District official guide. Carshalton : Home Publishing,  24p.
Nayling, Nigel. The Magor Pill medieval wreck. York : Council for British Archaeology, 1998. 173p.
Redknap, Mark. An archaeological and historical context for the medieval Magor Pill boat. Maritime Wales 19 (1997-98), p. 9-29.
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.
Magor Parish, consisting of Magor and Redwick Chapelry; Statistics; Area 10,514 acres; Population 353 males, 346 females, total 699
Magor Parish Church Attendance (average) - morning 80 + 30 scholars, afternoon 90 (alternate?) 1 service in English David Jones, Curate
Ebenezer Chapel, Baptist Erected 1816 Also used as a Day School Attendance - morning 50, evening 175 Thomas Leonard, Minister
Redwick Parish Church Attendance (average) - 30 + 10 scholars, afternoon 30 + 10 scholars (alternate?) 1 service in English D Jones, Curate
Salem Chapel, Baptist Erected 1832 Attendance - morning 21 + 13 scholars, evening 68 Thomas Leonard, Baptist Minister
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 ST425869 (Lat/Lon: 51.577969, -2.831206), Magwyr / Magor which are provided by: