- source: Family History Library Catalog
- the following text is based on an article in Wikipedia
St. John (Cornish: Sen Yowann) is a coastal civil parish and a village in southeast Cornwall, England, 3 miles (4.8 km) south of Saltash and 1.5 miles (2.4 km) south-east of Torpoint.
The parish is opposite Plymouth, separated from it by St John's Lake, an inlet of The Hamoaze in Plymouth Sound. The population of St John parish was 375 in the 2001 census. To the north, the parish is bordered by St John's Lake and to the south by the sea. To the east, the parish is bordered by Millbrook, to the south-east by Maker-with-Rame and to the west by Antony parish.
St. John was part of the East Hundred of Cornwall and in St. Germans Rural District between 1894 and 1974.
A Vision of Britain through Time provides the following description of St. John from John Marius Wilson's Imperial Gazetteer of England and Wales of 1870-72:
- "JOHN (ST.), a village and a parish in St. Germans district, Cornwall. The village stands at the head of a branch of the Hamoaze, called St. John's lake, opposite Devonport town and [railway] station, and 5½ miles SE by E of St. Germans. The parish extends to the English Channel; and comprises 698 acres of land, and 125 of water. Post town, Devonport. Real property: £1,094. Population in 1851: 155; in 1861: 213. Houses: 38. The increase of population arose from the temporary presence of labourers at the erection of forts. The manor formerly belonged to the Champernowns, and belongs now to Deeble Boger, Esq. Tregenhawke belonged to the Trevilles, and others; and passed to Lord Graves. The living is a rectory in the diocese of Exeter. Value: £179. Patron: W. H. Pole Carew, Esq. The church measures 56 feet by 18: and was restored in 1866."