There are three principal city metropolitan areas on the island of Ireland. Dublin and Cork are in the Republic of Ireland and Belfast is in Northern Ireland.
*Dublin - 1,661,185
*Belfast - 579,276
*Cork - 190,384
Other cities:
*Limerick - 90,757
*Derry - 90,663
*Galway - 72,729
*Lisburn - 71,465
*Waterford - 49,213
*Newry - 27,433
*Kilkenny - 22,179
*Armagh - 14,590
It is important to note there are many towns larger than some cities in Ireland.