Gayhurst is a village and civil parish in the unitary authority area of the City of Milton Keynes, Buckinghamshire, England.

The village name is an Old English language word meaning 'wooded hill where goats are kept'.

[4] In 1582, Queen Elizabeth I made a grant of Gayhurst Manor "in the event of its reversion to the Crown" to Sir Francis Drake,[4] but there is no record that he ever received it.

[4] His son, Sir Kenelm Digby (1603–1665), was an English courtier, diplomat, natural philosopher and astrologer.

Gayhurst had an outstation from the Bletchley Park codebreaking establishment, where one of the Bombes used to decode German Enigma messages in World War Two were housed.