John Egerton, 3rd Earl of Bridgewater, KB, PC (9 November 1646 – 19 March 1701) was an English politician.

He was the eldest son of John Egerton, 2nd Earl of Bridgewater and his wife Elizabeth Cavendish.

His maternal grandparents were William Cavendish, 1st Duke of Newcastle and his first wife Elizabeth Basset.

They had only one known child who survived birth: On 2 April 1673, Bridgewater married his second wife Jane Paulet.

Mary was the eldest illegitimate daughter of Emanuel Scrope, 1st Earl of Sunderland, and his mistress Martha Jones; she became her father's co-heiress when a brother died childless.