Dunwich is a village and civil parish in the English county of Suffolk. It is located in the Suffolk Coast and Heaths AONB around north-east of London, south of Southwold and north of Leiston on the North Sea coast.
In the Anglo-Saxon period, Dunwich was the capital of Kingdom of the East Angles but the harbour and most of the town have since disappeared due to coastal erosion. At its height it was an international port similar in size to 14th-century London. Its decline began in 1286 when a storm surge hit the East Anglian coast followed by a great storm in 1287 and another great storm also in 1287, and it was eventually reduced in size to the village it is today. Its population at the 2001 census was 804.