St Keyne is a civil parish and village in east Cornwall, England, United Kingdom. The parish lies between the parishes of Liskeard and Duloe. The parish population at the 2011 census was 492.In Victorian times the holy well in St Keyne had the reputation of conferring supremacy to the marriage partner who first tasted it. There was also a ballad called ″The Well of St Keyne″.The church is dedicated to Saint Keyne, said to be one of the daughters of the legendary Welsh King Brychan. The church is of little architectural interest. The Perpendicular north aisle has probably been added to a church originally cruciform in plan . The west tower is of three storeys and without buttresses.The village is served by a railway station known as St Keyne Wishing Well Halt.