Kit's Coty House or Kit's Coty is a chambered long barrow near the village of Aylesford in the southeastern English county of Kent. Constructed circa 4000 BCE, during the Early Neolithic period of British prehistory, today it survives in a ruined state. They were among the first ancient British remains to be protected by the state, on the advice of General Augustus Pitt-Rivers, the first Inspector of Ancient Monuments. The site is now under the ownership of non-departmental public body English Heritage, and is open to visitors all year round.