Lydd is a town in Kent, lying on the Romney Marsh. It is one of the larger towns on the Marsh and the most southerly town in Kent.

Actually located on Denge Marsh, Lydd was one of the first sandy islands to form as the bay evolved into what is now called the Romney Marsh. 

The name Hlyda, which derives from the Latin word for "shore", was found in a Saxon charter dating from the 8th century. The parish of Lydd comprises the town of Lydd, Dungeness, Lydd-on-Sea and parts of Greatstone. 

Notable buildings in Lydd include a guildhall and a medieval courthouse. Chamberlain and Churchwarden Accounts of the Fifteenth century survive alongside the town charters. ​