The Castletown River is a river which flows through the town of Dundalk, Ireland. "Riverine" redirects here For the use of that term in Maritime geography, see there Dundalk (Dún Dealgan is the County town of County Louth in Ireland, situated close to the border with Northern Ireland. Ireland (pronounced /ˈaɾlənd/ Éire) is the third largest island in Europe, and the twentieth-largest island in the world It rises near Newtownhamilton, Co. Armagh, and is known as the River Creggan in its upper reaches. Newtownhamilton is a small Village in County Armagh, Northern Ireland. County Armagh ( Contae Ard Mhacha in Irish - from the height of Macha) is a county in Ulster in the north east of Ireland Its two main tributaries are the Kilkurry and Falmore rivers and enters Dundalk Bay on the East Coast of Ireland. [1][2]