Population of the Republic of Ireland by gender 1821-2011

From 1821 until 2011, the male and female populations of the 26 counties of the modern-day Republic of Ireland grew at a relatively similar rate, however some fluctuations did occur. During this time, the entire island of Ireland was a part of the United Kingdom of Great Britain and Ireland, after both islands were united by the Acts of Union in 1800. This graph shows the populations of the 26 counties that would later form the Republic of Ireland in 1921, and does not include the six counties that became known as Northern Ireland.

As we can see, both populations follow a relatively similar trend throughout their respective histories. In the first three entries, women outnumber men by 70,000 to 120,000, although these figures do not include military personnel which would narrow this margin. Both populations fall at a similar rate during and after the famine, however the male population does fall slightly faster, possibly due to an increased rate of emigration among males. Another point where both populations differ is in the early twentieth century, where the female population declines in a relatively smooth curve, although the male populations peak in the census data before and after both world wars. From 1956 onwards both populations follow a very similar trend, and grow at the same rate. The difference in population sizes never exceeds 30,000 people, until the final entry in 2011 where the population of men is 2.27 million and the population of women is 2.31 million.

Population of the Republic of Ireland from 1821 to 2011, by gender

ROI male populationROI female population
20112.272.31
20062.122.12
20021.951.97
19961.81.83
19911.751.77
19861.771.77
19811.731.71
19791.691.67
19711.51.48
19661.451.43
19611.421.4
19561.461.44
19511.511.45
19461.491.46
19361.521.45
19261.511.47
19111.591.55
19011.611.61
18911.731.74
18811.911.96
18711.992.06
18612.172.23
18512.492.62
18413.223.31
18313.043.16
18212.672.74
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Sources

Release date

July 2019

Region

Ireland

Survey time period

1821 to 2011

Supplementary notes

Please note the difference in intervals between certain years. Some data from the early 1900s came at irregular years due to Ireland's independence movement as well as international factors, such as WWII. The intervals also change from every 10 years to (mostly) 5 years from 1946 onwards.

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