Haynes Park is a Georgian country house which stands in parkland at Haynes Church End, Bedfordshire, England. It is a Grade I listed building. Originally known as Hawnes Park it was built c.1725 for John Carteret, 2nd Earl Granville, a prominent statesman and remodelled and expanded several times since by his descendants. It is constructed of red and white brick to a square plan in two storeys with attics and slate roofs. Later extensions formed a courtyard. The south front has 13 bays in a 3-7-3 formation surmounted by a parapet, the two outer bays projecting in 2-storey bows. It stands in an estate which today comprises some 800 acres (320ha) of parkland and woodland.