Carlingford's inability to develop a heavy industry allowed its mediaeval layout and archaeological artefacts to remain relatively intact. The area was opened up to tourism in the 1870s by the Dundalk, Newry and Greenore railway, which passed through Carlingford. This line closed in 1951. These transport links led to tourism being a key source of employment. Fishing was also important economically; particularly oysters and crabs from the nearby harbour. The town hosts the annual Carlingford Oyster Festival usually held in August. A passenger ferry operates daily out of the village of Greenore, away, during the summer months.
