Back to Top

Central Statistics Office

Search currently unavailable

 Skip navigation

Population

1.1 Population by county, 1911 and 2011
     
Area19112011change% change
State3,139,6884,588,2521,448,56446%
     
Leinster1,162,0442,504,8141,342,770116%
     
Carlow36,25254,61218,36051%
Dublin city304,802527,612222,81073%
Dublin county172,394745,457573,063332%
Kildare66,627210,312143,685216%
Kilkenny74,96295,41920,45727%
Laois54,62980,55925,93047%
Longford43,82039,000-4,820-11%
Louth63,665122,89759,23293%
Meath65,091184,135119,044183%
Offaly56,83276,68719,85535%
Westmeath59,98686,16426,17844%
Wexford102,273145,32043,04742%
Wicklow60,711136,64075,929125%
     
Munster1,035,4951,246,088210,59320%
     
Clare104,232117,19612,96412%
Cork392,104519,032126,92832%
Kerry159,691145,502-14,189-9%
Limerick143,069191,80948,74034%
Tipperary152,433158,7546,3214%
Waterford83,966113,79529,82936%
     
Connacht610,984542,547-68,437-11%
     
Galway182,224250,65368,42938%
Leitrim63,58231,798-31,784-50%
Mayo192,177130,638-61,539-32%
Roscommon93,95664,065-29,891-32%
Sligo79,04565,393-13,652-17%
     
Ulster (part of)331,165294,803-36,362-11%
     
Cavan91,17373,183-17,990-20%
Donegal168,537161,137-7,400-4%
Monaghan71,45560,483-10,972-15%
Source: Census of Population

Interactive table: Statbank link

Group of children commissionsed by Rev. Fr. Coghlan 1915

Photo: Group of children commissioned by Fr. Coghlan, 1915

  • The population of Ireland grew from 3,139,688 people in 1911 to 4,588,252 by 2011, an increase of 46%.
  • The 5 counties with the largest increases in population between 1911 and 2011 were all in Leinster.  The population of Dublin county more than quadrupled, from 172,394 people in 1911 to 745,457 by 2011. The population of Kildare more than tripled over the same period while Meath had a population increase of 183%. There were also large increases in population in Wicklow (125%) and Louth (93%).
  • In Munster there was a drop in population in Kerry of 9% but the other counties in Munster saw population growth, with rates of above 30% in Waterford, Limerick and Cork.
  • All counties in Connacht, with the exception of Galway, had population decreases between 1911 and 2011.
  • The three counties in Ulster had a drop in population between 1911 and 2011, with a decrease of 20% in Cavan and a drop of 15% in Monaghan

This map is © Ordnance Survey Ireland. All rights reserved. License number 01/05/001.
1.2 Population by age group, 1911 and 2011
       
Age group19112011
 MalesFemalesTotalMalesFemalesTotal
0-4155,887151,278307,165182,076174,253356,329
5-9157,597152,566310,163164,037156,733320,770
10-14154,182148,967303,149155,076147,415302,491
15-19155,523147,920303,443144,262138,757283,019
20-24141,288127,770269,058146,636150,595297,231
25-29117,352119,005236,357173,714187,408361,122
30-34111,381106,538217,919194,774199,171393,945
35-39106,20598,534204,739182,237182,024364,261
40-4492,16683,494175,660166,330164,482330,812
45-4973,69068,286141,976151,516153,669305,185
50-5469,18968,024137,213136,737137,649274,386
55-5952,77651,858104,634122,121122,401244,522
60-6447,33450,93098,264109,869108,917218,786
65-6952,79955,840108,63986,29887,340173,638
70-7456,34770,552126,89963,47667,714131,190
75+45,79348,61794,41093,540137,025230,565
Total1,589,5091,550,1793,139,6882,272,6992,315,5534,588,252
Source: Census of Population

 Members of the Congested Districts Board receiving directions from a local woman

Photo: Members of Congested Districts  Board receiving directions from a local women

  • The structure of the Irish population has changed markedly between 1911 and 2011.
  • In 1911 29.3% of the Irish population was aged under 15 years, while by 2011 this had dropped to 21.3%.
  • In 1911 18.2% of the population was aged 15-24 and by 2011 this had decreased to 12.6%.
  • Thus in 1911 just under half the population was aged under 25 but this had dropped to 33.9% by 2011.
  • 15.4% of the Irish population was aged between 45 and 64 in 1911 and this had increased to 22.7% by 2011, while 10.5% of the population in 1911 was aged 65 or over and this had increased slightly to 11.7% by 2011.

MaleFemale
75+-4579348617
70-74-5634770552
65-69-5279955840
60-64-4733450930
55-59-5277651858
50-54-6918968024
45-49-7369068286
40-44-9216683494
35-39-10620598534
30-34-111381106538
25-29-117352119005
20-24-141288127770
15-19-155523147920
10-14-154182148967
5-9-157597152566
0-4-155887151278
MaleFemale
95+-7402912
90-94-415510722
85-89-1359126296
80-84-2842341690
75-79-4663155405
70-74-6347667714
65-69-8629887340
60-64-109869108917
55-59-122121122401
50-54-136737137649
45-49-151516153669
40-44-166330164482
35-39-182237182024
30-34-194774199171
25-29-173714187408
20-24-146636150595
15-19-144262138757
10-14-155076147415
5-9-164037156733
0-4-182076174253

Interactive table: Statbank link

1.3 Comparing 1911 population aged by 15 years with 1926 population
              
Projected 1926 population1 Actual 1926 population Actual 1926 population less projected 1926 population
Age in 1911Age in 1926MalesFemalesTotal Age in 1926MalesFemalesTotal MalesFemalesTotal
0-415-19155,887151,278307,165 15-19146,047140,140286,187 -9,840-11,138-20,978
5-920-24157,597152,566310,163 20-24124,518115,713240,231 -33,079-36,853-69,932
10-1425-29154,182148,967303,149 25-29106,646108,755215,401 -47,536-40,212-87,748
15-1930-34155,523147,920303,443 30-3492,50290,798183,300 -63,021-57,122-120,143
20-2435-39141,288127,770269,058 35-3987,34988,410175,759 -53,939-39,360-93,299
25-2940-44117,352119,005236,357 40-4486,05083,035169,085 -31,302-35,970-67,272
30-3445-49111,381106,538217,919 45-4987,01081,883168,893 -24,371-24,655-49,026
35-3950-54106,20598,534204,739 50-5485,64877,070162,718 -20,557-21,464-42,021
 Source: Census of Population
1 1911 population aged by 15 years.
  • In this table we take the 1911 population, age them by 15 years and then compare them to the 1926 population. (Thus the 155,887 young boys aged 0-4 in 1911 would have been aged 15-19 by 1926. We compare the 155,887 figure to the actual number of 15-19 year old males in 1926 which was 146,047 and this gives a difference of 9,840 boys.)
  • The columns in the table above with the "Actual 1926 population less projected 1926 population" shows that the age groups from 5-9 to those aged 30-34 in 1911 suffered very large losses betwwen 1911 and 1926.
  • For example, there were 155,523 young men aged 15-19 in 1911 but by 1926 there were 92,502 men aged 30-34, meaning that 63,021 young men need to be accounted for by either death or emigration. There were 147,920 young women aged 15-19 in 1911 and by 1926 there were 90,798 women aged 30-34, leaving 57,122 young women needing to be accounted for either by death or emigration.
  • The column "Actual 1926 population less projected 1926 population" shows that more males than females are absent for those aged between 10 and 24 in 1911. For example, for those aged 20-24 in 1911,  53,939 males are absent by 1926 compared to 39,360 females. Part of this difference must be due to deaths of Irish Men in World War I. There is no consensus on how many men from the island of Ireland died fighting in this war but at least 35,000 and possibly as many as 49,000 are believed to have died.
  • Another cause of deaths in the period between 1911 and 1926 was the Spanish flu pandemic which was responsible for about 20,000 deaths on the island of Ireland in 1918/19.

Go to next chapter >>> Names