List of settlements on the island of Ireland by population
This is a list of the 60 largest towns and cities on the island of Ireland by population. It therefore includes towns and cities in both the Republic of Ireland and Northern Ireland. The population figures listed are for the urban area centred around each settlement excluding areas that fall within the boundary of another town or city. The figures for Northern Ireland towns are based on the 2011 Northern Ireland Census, while the figures for towns in the Republic are based on the 2006 Census of Ireland, and cities in the Republic of Ireland are based on the 2016 Census of Ireland.
|1||Dublin||1,173,179||Leinster||County Dublin||Republic||Capital city of the Republic of Ireland and has mainly been the island's largest settlement since the Middle Ages (Belfast had a larger population than Dublin for a while in the very late nineteenth-century and very early twentieth-century).|
|2||Belfast||483,418||Ulster||County Antrim, County Down||Northern||Capital of Northern Ireland and largest city in all of Ulster. The city is home to Northern Ireland's devolved government and power-sharing assembly. Belfast received city status in 1888. It was briefly Ireland's biggest city in the late 19th century.|
|3||Cork||208,669||Munster||County Cork||Republic||Largest city in the province of Munster in the south of Ireland. Cork is one of Ireland's oldest cities, having received city status in the 900s.|
|4||Limerick||94,192||Munster||County Limerick, County Clare||Republic||Principal city of Ireland's Mid-West Region and second-largest city in Munster|
|5||Derry||93,512||Ulster||County Londonderry||Northern||Second-largest city in all of Ulster|
|6||Galway||79,934||Connacht||County Galway||Republic||Largest city in the province of Connacht and the sparsely-populated West of Ireland|
|7||Newtownabbey||65,646||Ulster||County Antrim||Northern||Largest town in Northern Ireland and Ireland as a whole. Part of the Belfast Metropolitan Area.|
|8||Bangor||61,011||Ulster||County Down||Northern||The town is part of the Belfast Metropolitan Area|
|9||Waterford||53,504||Munster||County Waterford, County Kilkenny||Republic||Third-largest in the province of Munster. It is the island of Ireland’s oldest surviving city founded by Vikings in the 9th century AD.|
|10||Lisburn||45,370||Ulster||County Antrim, County Down||Northern||Granted city status in 2002. The city lies on the border between County Antrim and County Down; Northern Ireland's two most populated counties. Though a city in its own right, it is also part of the wider Belfast Metropolitan Area.|
|11||Drogheda||40,956||Leinster||County Louth, County Meath||Republic||Largest town in the Republic of Ireland, located in County Louth with its southern environs located in County Meath|
|12||Dundalk||39,904||Leinster||County Louth||Republic||County town of County Louth|
|13||Swords||39,248||Leinster||County Dublin||Republic||North Dublin suburban town and second-largest settlement in County Dublin after the city itself. Forms part of the Greater Dublin Area.|
|14||Bray||32,600||Leinster||County Wicklow||Republic||Most populous town in County Wicklow|
|15||Navan||30,173||Leinster||County Meath||Republic||Largest settlement in County Meath|
|19||Newry||26,967||Ulster||County Down||Northern||Granted city status in 2000, it is Northern Ireland's fourth-largest city|
|20||Kilkenny||26,512||Leinster||County Kilkenny||Republic||County town of County Kilkenny, granted city status in 1609|
|21||Ennis||25,276||Munster||County Clare||Republic||County town and largest settlement in County Clare. Largest town in Munster.|
|24||Tralee||23,691||Munster||County Kerry||Republic||County town and largest settlement in County Kerry|
|28||Portlaoise||22,050||Leinster||County Laois||Republic||County town and largest settlement in County Laois|
|32||Mullingar||20,928||Leinster||County Westmeath||Republic||County town of County Westmeath|
|34||Wexford||20,188||Leinster||County Wexford||Republic||County town of County Wexford|
|35||Omagh||19,659||Ulster||County Tyrone||Northern||County town of County Tyrone|
|36||Letterkenny||19,274||Ulster||County Donegal||Republic||Largest settlement in County Donegal|
|37||Sligo||19,199||Connacht||County Sligo||Republic||County town of County Sligo, second largest settlement in Connacht and largest town in Connacht|
|40||Clonmel||17,140||Munster||County Tipperary||Republic||Largest settlement in County Tipperary|
|45||Armagh||14,777||Ulster||County Armagh||Northern||County town of County Armagh|
|46||Tullamore||14,607||Leinster||County Offaly||Republic||County town and largest settlement in County Offaly|
|50||Enniskillen||13,823||Ulster||County Fermanagh||Northern||County town and largest settlement in County Fermanagh|
|57||Castlebar||12,068||Connacht||County Mayo||Republic||County town and largest settlement in County Mayo|
- List of urban areas in the Republic of Ireland by population
- List of localities in Northern Ireland by population
- List of places in Northern Ireland
- List of Irish counties by population
- "Census 2011" (PDF). Nisra.gov.uk. Retrieved 5 February 2019.
- "Census 2016" (PDF). Cso.ie. Retrieved 5 February 2019.
- "Latest News - All-Island Research Observatory". Airo.maynoothuniversity.ie. Retrieved 5 February 2019.
- "Dundalk Legal Town Results inc. Environs". Central Statistics Office. 2011. Archived from the original on 29 October 2014. Retrieved 28 February 2014.