Dundalk () is a town in County Louth, Republic of Ireland, near the border with Northern Ireland. It takes its name from , "Dalga's fort" and officially became a town in 1189. It is located at a ford on the Castletown River. The town's crest reads "Mé do rug Cú Chulainn Cróga" (I gave birth to brave Cú Chulainn)