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St Erfyl's church, Llanerfyl - geograph.org.uk - 1594259.jpg
St Erfyl's church, Llanerfyl
Llanerfyl is located in Powys
 Llanerfyl shown within Powys
Population 402 (2001)
OS grid reference SJ041130
Principal area Powys
Ceremonial county Powys
Country Wales
Sovereign state United Kingdom
Postcode district SY21
Dialling code 01938
Police Dyfed-Powys
Fire Mid and West Wales
Ambulance Welsh
EU Parliament Wales
UK Parliament Montgomeryshire
Welsh Assembly Montgomeryshire
List of places

Coordinates: 52°42′24″N 3°25′12″W / 52.706539°N 3.419930°W / 52.706539; -3.419930

Llanerfyl is a village and community in Powys, Wales. Located near the River Banwy the community includes the village of Llanerfyl, several farms and wide tracts of marchland. The southern part of the community include Cwm Nant yr Eira, which suffered severe depopulation in the 20th century.[1] The 2001 census gives the population of the community as 402.

The village contains St Erfyl's church, named after Erfyl, it was rebuilt in 1870 it contains the remnants of a 15th-century shrine. The circular churchyard has in it a gravestone from either the 5th or 6th century commemorating the death of a 13 year-old girl.

Notable residents[edit]

Sir Charles Robert Harington, FRS, a notable biochemist, was born in the village in 1897.


  1. ^ Davies, John; Jenkins, Nigel; Menna, Baines et al., eds. (2008). The Welsh Academy Encyclopaedia of Wales. Cardiff: University of Wales Press. p. 485. ISBN 978-0-7083-1953-6.