Cothelstone is a village and civil parish in Somerset, England, situated in the Quantock Hills six miles north of Taunton.

[7] During the English Civil War, Sir John Stawell of Cothelstone had raised a small force at his own expense to defend the King.

Taunton fell to parliamentary troops and was held by Robert Blake who attacked Stawell at Bishops Lydeard and imprisoned him.

[12] The nearby St Agnes' Well is a Grade II* Well house dating from the Medieval period and restored in the nineteenth century.

It has a varied folklore, noted as being a healing well, a wishing well of considerable power, an aid to fertility, and virgins used divinations to 'discover' their future husbands on the eve of St Agnes's feast day.

Originally planted in the 18th century by Mary Hill, Lady Hillsborough, they form a well-known and prominent landmark visible from large areas of Somerset and South Wales.