1861 Census of Ireland, The Census of Ireland for the Year 1861. Part I. Area, Population and Number of Houses, by Townlands and Electoral Divisions., Table [1] : " Area, population and number of houses".

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Area (Acres)
[1]
Population
Houses
In 1841
In 1851
In 1861
In 1841
In 1851
In 1861
Persons
[2]
Persons
[3]
Males
[4]
Females
[5]
Persons
[6]
Number
[7]
Number
[8]
Inhabited
[9]
Uninhabited
[10]
Building
[11]
Total
[12]
Ireland Dep Total   20,322,641 Show data context 8,174,031 Show data context 6,553,579 Show data context 2,837,370 Show data context 2,961,597 Show data context 5,798,967 Show data context 1,384,479 Show data context 1,113,165 Show data context 995,205 Show data context 40,957 Show data context 2,920 Show data context 1,039,082 Show data context
Leinster IProv Drill-down 4,834,865 Show data context 1,972,881 Show data context 1,672,543 Show data context 715,005 Show data context 742,630 Show data context 1,457,635 Show data context 320,050 Show data context 276,121 Show data context 236,614 Show data context 10,520 Show data context 863 Show data context 247,997 Show data context
Munster IProv Drill-down 5,934,789 Show data context 2,396,055 Show data context 1,857,244 Show data context 744,682 Show data context 768,876 Show data context 1,513,558 Show data context 377,615 Show data context 286,801 Show data context 243,317 Show data context 9,961 Show data context 725 Show data context 254,003 Show data context
Ulster IProv Drill-down 5,319,790 Show data context 2,386,313 Show data context 2,011,786 Show data context 923,255 Show data context 990,981 Show data context 1,914,236 Show data context 436,864 Show data context 373,054 Show data context 351,654 Show data context 16,415 Show data context 802 Show data context 368,871 Show data context
Connaught IProv Drill-down 4,233,197 Show data context 1,418,782 Show data context 1,012,006 Show data context 454,035 Show data context 459,100 Show data context 913,135 Show data context 249,950 Show data context 177,189 Show data context 163,620 Show data context 4,061 Show data context 530 Show data context 168,211 Show data context

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Comments:

1 Parishes were often divided between different Baronies, and Baronies were sometimes divided between different Counties, but this reconstruction always lists the totals for whole Parishes or Baronies. The original table also sometimes lists separate counts for 'Towns' and the remainders of Parishes, but here again we list only Parish totals.
2 The original table lists areas in Acres, Rods and Perches, but they have been converted here into decimal acres.
3 The original table also includes Poor Law and General Valuations for each area.

This website does not try to provide an exact replica of the original printed census tables, which often had thousands of rows and far more columns than will fit on our web pages. Instead, we let you drill down from national totals to the most detailed data available. The column headings are those that appeared in the original printed report. The numbers presented here, which are the same ones we use to create statistical maps and graphs, come from the census table and have usually been carefully checked.

The system can only hold statistics for units listed in our administrative gazetteer, so some rows from the original table may be missing. Sometimes big low-level units, like urban parishes, were divided between more than one higher-level units, like Registration sub-Districts. This is why some pages will give a higher figure for a lower-level unit: it covers the whole of the lower-level unit, not just the part within the current higher-level unit.