St Allen (Cornish: Eglosallen) is a civil parish in Cornwall, England, United Kingdom. The church town of St Allen is an isolated hamlet and the main settlement in the parish is Zelah which is situated on the A30 trunk road four miles (6.5 km) north of Truro.
The population in the 2001 census was 435 people and the parish occupies 3,506 acres (14.19 km2) of land. The population had increased to 495 at the 2011 census.
The manor of Cargoll included St Allen and it was in the possession of the bishops of Exeter from 1269 (the manor house was at Lanner). From 1287 the patrons of the living were the canons of Glasney College.).
St Allen parish church was built in the Norman period but enlarged by the addition of the south aisle in the 15th century (the dedication is to St Alunus). Little is known of this saint but he has been identified with the Breton bishop Alan of Quimper who came from Wales.
The 1881 English Census indicates that John Noon Munford was the Rector and living in the Rectory with his wife and two children and two servants.
Arthur Langdon (1896) recorded four Cornish crosses in the parish: one at the farm of Lower Town is buried upside down in the ground; the others are defaced crosses at Tolcarn, Trefronick and Trevalsa. Andrew Langdon (1994) also recorded four crosses as well as a font adapted from a Gothic cross base. Three of these crosses are in the churchyard, of which one was removed from Trefronick Farm in 1911. Andrew Langdon (citing a 1913 paper by William J. Stephens in the Journal of the Royal Institution of Cornwall) notes that Arthur Langdon had described the same cross twice, as Trevalsa cross and Lower Town cross are the same.
- Ordnance Survey: Landranger map sheet 204 Truro & Falmouth ISBN 978-0-319-23149-4
- "Parish population 2011". Retrieved 12 February 2015.
- Cornish Church Guide (1925) Truro: Blackford; p. 54
- Cornish Church Guide (1925) Truro: Blackford
- Langdon, A. G. (1896) Old Cornish Crosses. Truro: Joseph Pollard; pp. 222-23 & 217-18
- Langdon, A. G. (2002) Stone Crosses in Mid Cornwall; 2nd ed. Federation of Old Cornwall Societies; pp. 18-21
- "GENUKI article on St Allen". Retrieved 3 June 2009.
- Cornwall Record Office. "Online Catalogue for St Allen". Retrieved 3 June 2009.
- Wasley, K. "St Allen". Retrieved 3 June 2009.
- "East Wheal Rose disaster". Retrieved 3 June 2009.
- "St Allen Opposes the Industrialisation of the Landscape (S.O.I.L.)".