Mapping Ireland’s Population Dynamics: County by County Insights

By KatRisk Product
14 Sep 2023

KatRisk have examined the 2022 census data to find patterns in population distribution and change around the country.

As well as the cities of Dublin, Cork, Limerick, Galway and Waterford, there are three more towns with populations over 30,000: Dundalk and Drogheda in County Louth and Swords in County Dublin. Naturally, the cities have also seen the most population growth, but towns with growth of more than 3,000 people since the previous census are also found in Kildare, Louth, Wicklow, Meath, Donegal and Carlow.

When population growth is put in percentage terms, there are towns in Kildare, Wexford, Meath, Clare and Donegal where population jumped by more than 50%. On the other hand, some towns in Galway, Kerry, Limerick, Clare and Longford experienced negative growth, having lost more than 8% of their 2016 populations by the time of the 2022 census.

Most towns have a population density of between 1,000 and 2,000 people per square kilometre, but this can be higher, especially in the greater Dublin area – in fact, all of the settlements with more than 4,000 people per square kilometre are found in Dublin, Kildare or Meath. There are also 6 towns where population density is less than 500 people per square kilometre, and these are located in Clare, Donegal, Cork and Tipperary.

The youngest towns, with an average age of 30 or 31, are found in Dublin, Cork, Sligo and Galway, while Cork and Mayo have some of the oldest towns, where the average age is 46 or 47.

According to the latest figures, some 12% of adults aged 18 and over are living with their parents. The towns where more than one adult in six lives with their parents are found in Clare, Kildare, Meath, Wicklow, Cork, Westmeath, Louth, Offaly, Donegal and Dublin.

Carlow

Biggest population – Carlow Town (27,531)
Highest population density – Carlow Town (2,334/km²)
Biggest increase since 2016 Census – Carlow Town (3,079)

Most % growth in population since 2016 Census – Rathvilly (14%)
Oldest population – Muinebeag (Bagenalstown) (39 years)
Youngest population – Tullow (36 years)
Biggest percentage of adults living with their parents – Muinebeag (Bagenalstown) (15%)

Cavan

Biggest population – Cavan Town (11,741)
Highest population density – Ballyjamesduff (2,277/km²)
Biggest increase since 2016 Census – Cavan Town (827)
Most % growth in population since 2016 Census – Ballyconnell (29%)

Oldest population – Cootehill (40)
Youngest population – Mullagh (34)
Biggest percentage of adults living with their parents – Ballinagh (14%)

Clare

Biggest population – Ennis (27,923)
Highest population density – Sixmilebridge (2,132/km²)
Biggest increase since 2016 Census – Ennis (2,674)
Most % growth in population since 2016 Census – Lehinch (60%)
Oldest population – Kilkee (45)

Youngest population – Sixmilebridge (34)
Biggest percentage of adults living with their parents – Ardnacrusha (21%) (highest in country)

Cork

Biggest population – Cork City (222,526)
- Outside city – Carrigaline (18,239)

Highest population density – Cloyne (3,108/km²)
Biggest increase since 2016 Census – Cork City (13,857)
- Outside city – Carrigaline (2,469)
Most % growth in population since 2016 Census – Watergrasshill (37%)

Oldest population – Newmarket (46)
Youngest population – Watergrasshill (30)
Biggest percentage of adults living with their parents – Tower (19%)

Donegal

Biggest population – Letterkenny (22,549)
Highest population density – Newtowncunningham (1,604/km²)
Biggest increase since 2016 Census – Letterkenny (3,275)
Most % growth in population since 2016 Census – Greencastle (53%)
Oldest population – An Clochan Liath (45)
Youngest population – Newtowncunningham (35)
Biggest percentage of adults living with their parents – Newtowncunningham (18%)

Dublin

Biggest population – Dublin City (1,263,219)
- Outside city – Swords (40,776)

Highest population density – Kinsealy-Drinan (8,401/km²)
Biggest increase since 2016 Census – Dublin City (90,040)
- Outside city – Balbriggan (2,600)
Most % growth in population since 2016 Census – Newcastle (46%)

Oldest population – Portrane (43)
Youngest population – Saggart (30)
Biggest percentage of adults living with their parents – Rush (18%)

Galway

Biggest population – Galway City (85,910)
- Outside city – Tuam (9,647)

Highest population density – Baile Chláir (2,832/km²)
Biggest increase since 2016 Census – Galway City (5,976)
- Outside city – Tuam – (880)

Most % growth in population since 2016 Census – Oughterard (40%)
Oldest population – Clifden (43)
Youngest population – Baile Chláir (31)
Biggest percentage of adults living with their parents – Oughterard (15%)

Kerry

Biggest population – Tralee (26,079)
Highest population density – Milltown (1,681/km²)
Biggest increase since 2016 Census – Tralee (2,388)
Most % growth in population since 2016 Census – Caherciveen (25%)

Oldest population – Dingle (44)
Youngest population – Milltown (36)
Biggest percentage of adults living with their parents – Castleisland (13%)

Kildare

Biggest population – Naas (26,180)
Highest population density – Sallins (4,126/km²)
Biggest increase since 2016 Census – (4,787)
Most % growth in population since 2016 Census – Blackwood (98%)
Oldest population – Leixlip (38)

Youngest population – Kilcock (32)
Biggest percentage of adults living with their parents – Johnstown (21%)

Kilkenny

Biggest population – Kilkenny (27,184)

Highest population density – Kilkenny (2,348/km²)
Biggest increase since 2016 Census – Kilkenny (672)
Most % growth in population since 2016 Census – Urlingord (15%)
Oldest population – Graiguenamanagh-Tinnahinch (43 years)
Youngest population – Piltown (36)
Biggest percentage of adults living with their parents – Castlecomer (16%)

Laois

Biggest population – Portlaoise (23,494)
Highest population density – Portlaoise (2,486/km²)

Biggest increase since 2016 Census – Portlaoise (1,444)
Most % growth in population since 2016 Census – Mountrath (17%)
Oldest population – Stradbally (42)
Youngest population – Ballylinan (34)
Biggest percentage of adults living with their parents – Mountmellick (16%)

Leitrim

Biggest population – Carrick-on-Shannon (4,743)
Highest population density – Kinlough (1,855/km²)
Biggest increase since 2016 Census – Carrick-on-Shannon (681)

Most % growth in population since 2016 Census – Drumshanbo (37%)
Oldest population – Mohill (43)
Youngest population – Kinlough (35)
Biggest percentage of adults living with their parents – Mohill (13%)

Limerick

Biggest population – Limerick City (102,287)
- Outside city – Newcastle West (7,209)

Highest population density – Moroe (3,016/km²)
Biggest increase since 2016 Census – Limerick City (8,095)
- Outside city – Newcastle West (590)

Most % growth in population since 2016 Census – Castleconnell (18%)
Oldest population – Kilmallock (42)
Youngest population – Moroe (32)
Biggest percentage of adults living with their parents – Abbeyfeale (14%)

Longford

Biggest population – Longford Town (10,952)
Highest population density – Edgeworthstown (2,219/km²)
Biggest increase since 2016 Census – Longford Town (944)

Most % growth in population since 2016 Census – Granard (30%)
Oldest population – Laneborough-Ballyleague (40)
Youngest population – Drumlish (35)
Biggest percentage of adults living with their parents – Edgeworthstown (12%)

Louth

Biggest population – Drogheda (44,135)
Highest population density – Drogheda (2,486/km²)
Biggest increase since 2016 Census – Dundalk (4,108)
Most % growth in population since 2016 Census – Termonfeckin (26%)

Oldest population – Castlebellingham-Kilsaran (41)
Youngest population – Tullyallen (32)
Biggest percentage of adults living with their parents – Dromiskin (18%)

Mayo

Biggest population – Castlebar (13,054)
Highest population density – Castlebar (1,576/km²)
Biggest increase since 2016 Census – Castlebar (986)
Most % growth in population since 2016 Census – Ballyhaunis (17%)
Oldest population – Knock (47)

Youngest population – Ballyhaunis (35)
Biggest percentage of adults living with their parents – Ballina (12%)

Meath

Biggest population – Navan (33,886)

Highest population density – Clonee (5,536/km²)
Biggest increase since 2016 Census – Laytown-Bettystown-Mornington-Donacarney (3,770)
Most % growth in population since 2016 Census – Dunshaughlin (65%)
Oldest population – Athboy (38)
Youngest population – Enfield (32)
Biggest percentage of adults living with their parents – Dunboyne (20%)

Monaghan

Biggest population – Monaghan Town (7,894)
Highest population density – Castleblayney (1,373/km²)

Biggest increase since 2016 Census – Carrickmacross (713)
Most % growth in population since 2016 Census – Carrickmacross (14%)
Oldest population – Clones (40)
Youngest population – Carrickmacross (37)
Biggest percentage of adults living with their parents – Carrickmacross (12%)

Offaly

Biggest population – Tullamore (15,598)
Highest population density – Edenderry (2,460/km²)
Biggest increase since 2016 Census – Tullamore (991)

Most % growth in population since 2016 Census – Daingean (14%)
Oldest population – Ferbane (42)
Youngest population – Daingean (35)
Biggest percentage of adults living with their parents – Kilcormac (18%)

Roscommon

Biggest population – Roscommon Town (6,555)
Highest population density – Ballaghadereen (1,425/km²)
Biggest increase since 2016 Census – Roscommon Town (679)
Most % growth in population since 2016 Census – Ballaghadereen (32%)

Oldest population – Boyle (43)
Youngest population – Ballaghadereen (36)
Biggest percentage of adults living with their parents – Roscommon Town (11%)

Sligo

Biggest population – Sligo Town (20,608)
Highest population density – Strandhill (2,472/km²)
Biggest increase since 2016 Census – Sligo Town (1,409)
Most % growth in population since 2016 Census – Ballysadare (29%)
Oldest population – Enniscrone (45)

Youngest population – Coolaney (31)
Biggest percentage of adults living with their parents – Collooney (10%)

Tipperary

Biggest population – Clonmel (18,369)

Highest population density – Cashel (1,866/km²)
Biggest increase since 2016 Census – Clonmel (1,229)
Most % growth in population since 2016 Census – Borrisokane (19%)
Oldest population – Carrick-on-Suir (41)
Youngest population – Newport (34)
Biggest percentage of adults living with their parents – Carrick-on-Suir (15%)

Waterford

Biggest population – Waterford City (60,079)
- Outside city – Tramore (11,277)

Highest population density – Ballinroad (2,154/km²)
Biggest increase since 2016 Census – Waterford City (6,576)
- Outside city – Tramore (896)

Most % growth in population since 2016 Census – Ballinroad (20%)
Oldest population – Tallow (41)

Youngest population – Ballinroad (33)
Biggest percentage of adults living with their parents – Portlaw (18%)

Westmeath

Biggest population – Athlone (22,869)

Highest population density – Kinnegad (3,474/km²)
Biggest increase since 2016 Census – Mullingar (1,739)
Most % growth in population since 2016 Census – Kilbeggan (22%)
Oldest population – Castlepollard (39)
Youngest population – Kinnegad (34)
Biggest percentage of adults living with their parents – Rochfortbridge (18%)

Wexford

Biggest population – Wexford Town (21,524)
Highest population density – Wexford Town (2,629/km²)

Biggest increase since 2016 Census – Gorey (1,695)
Most % growth in population since 2016 Census – Ballygeary / Rosslare Harbour (87%)
Oldest population – Rosslare (43)
Youngest population – Gorey (36)
Biggest percentage of adults living with their parents – Ferns (14%)

Wicklow

Biggest population – Bray (33,512)
Highest population density – Bray (3,398/km²)
Biggest increase since 2016 Census – Greystones (3,869)

Most % growth in population since 2016 Census – Rathdrum (36%)
Oldest population – Kilmaconague (41)
Youngest population – Rathnew (32)
Biggest percentage of adults living with their parents – Enniskerry (19%)

An even more detailed geographic breakdown will be released shortly, in which statistics are provided not just town by town but for small areas of approximately 100 households each. This will allow us to do very localised mapping and analysis of Ireland’s population profile.

Note on Analysis

Data are taken from the Central Statistics Office data releases on the 2016 and 2022 Census of Population. Only towns with populations of more than 1,000 people are included in this analysis.

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