The population of the parish in 2011 was counted at 3,339.
First built in 800, the church was rebuilt in the 13th century. The tower suffered damage and was repaired in the 15th century.
According to his legend, St Clarus was an Englishman who went to Cornwall to preach to the inhabitants in the 8th century. He founded the church at St Cleer and lived a saintly life nearby. However he rejected the advances of a local chieftainess who had fallen in love with him and when she continued to pester him he fled to France where he lived in an isolated hermitage. The enraged woman had him pursued and then murdered. The place he had lived was afterwards named Saint-Clair-sur-Epte. The saint's feast day is 4 November.
Prehistoric and mediæval remains
St Cleer's holy well is found near the churchyard, with a small building covering it, built of granite in the 15th century, to allow for a bowssening pool for total immersion.
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