CARLINGFORD, market town and port, Co. Louth, Ireland. Pop. (1926) 547. King John's castle dates from 1210. There are remains of castellated houses built during Elizabethan and pre vious wars. A Dominican monastery was founded in 1305. The town received several charters between the reigns of Edward II. and James II., and was represented in the Irish parliament until the Union. Carlingf ord Lough is a rock basin hollowed out by glacial action. The oyster beds have long been valuable.