Mawnan (Cornish: Maunan, meaning St Maunan) is a civil parish in south Cornwall, England, United Kingdom. It is situated in the former administrative district of Kerrier and is bounded to the south by the Helford River, to the east by the sea, and to the west by Constantine parish. The population was 1,454 in the 2001 census.
The parish is entirely rural and, as well as Mawnan Smith, it includes the hamlets of Carlidnack, Bareppa, Penwarne, Helford Passage, Maenporth and Durgan. The parish also contains several Victorian gardens, now open to the public: Glendurgan, Trebah, Carwinion, and Penjerrick.
The coastline and cliffs south-east of the church town from Toll Point to Rosemullion Head forms the Rosemullion SSSI (Site of Special Scientific Interest), noted for its geological and biological interest. Marine species found here include Mytilus mussels, various seaweeds and sea sponges, such as Botryllus schlosseri.
Mawnan lies within the Cornwall Area of Outstanding Natural Beauty (AONB). Almost a third of Cornwall has AONB designation, with the same status and protection as a National Park.
There are two Anglican churches: the 13th Century Church of St Mawnan and St Stephen in Mawnan Church and the 19th century Church of St Michael in Mawnan Smith village.
The land for St Michael's Church was given by the Rogers family of Carwinion and the building was completed in 1874.
The village of Mawnan Smith also has a Methodist chapel. There is a Catholic church dedicated to St Edward the Confessor in Old Church Road, which was completed in 1965.
- Mawnan History Group (2002). The Book of Mawnan: celebrating a South Cornwall parish. Tiverton, Devon: Halsgrove. ISBN 1-84114-148-8.
- GENUKI website; Mawnan; retrieved April 2010
- Ordnance Survey: Landranger map sheet 204 Truro & Falmouth ISBN 978-0-319-23149-4
- "Rosemullion". Natural England. 1990. Retrieved 12 November 2011.
- Church of England website: Notes on St Mawnan Church
- Marchant, E. C. (1897). "Rogers, John (1778–1856), divine, by E. C. Marchant". Dictionary of National Biography Vol. IL. Smith, Elder & Co. Retrieved 2007-12-13.