Irish Censuses & Census Substitutes
1911 household form for Wicklow shopkeeper, John Perrin Hopkins
When were censuses taken in Ireland and what survives?
The people of Ireland have been counted for various purposes over the last 300 years or so, mostly by the church and the state. Some of these records survive but most of the earliest ones are limited in scope both with respect to the detail they include and their geographical extent.
Let's start with the most genealogically useful censuses - population censuses of the whole of Ireland. These were taken every ten years from 1821, but those up to 1851 (bar a few fragments) were destroyed in the 1922 Four Courts fire. What is sometimes less well known is that those from 1861 through to 1891 were actually pulped by the prevailing government in a early bout of recycling zeal that left genealogists weeping many years later. That leaves us with the 1901 and 1911 censuses that did survive.
No census was taken in 1921 for fairly obvious reasons but by 1926 both the new Irish Free State and Northern Ireland did conduct a census of their respective counties. The records for the Irish Free State were released in April 2026, but sadly it appears that the returns for Northern Ireland were lost (possibly casually destroyed) during WW2. Claire Santry has written about the potential of the UK 1939 Register for finding Northern Irish kin but access is not straightforward.
The people of Ireland have been counted for various purposes over the last 300 years or so, mostly by the church and the state. Some of these records survive but most of the earliest ones are limited in scope both with respect to the detail they include and their geographical extent.
Let's start with the most genealogically useful censuses - population censuses of the whole of Ireland. These were taken every ten years from 1821, but those up to 1851 (bar a few fragments) were destroyed in the 1922 Four Courts fire. What is sometimes less well known is that those from 1861 through to 1891 were actually pulped by the prevailing government in a early bout of recycling zeal that left genealogists weeping many years later. That leaves us with the 1901 and 1911 censuses that did survive.
No census was taken in 1921 for fairly obvious reasons but by 1926 both the new Irish Free State and Northern Ireland did conduct a census of their respective counties. The records for the Irish Free State were released in April 2026, but sadly it appears that the returns for Northern Ireland were lost (possibly casually destroyed) during WW2. Claire Santry has written about the potential of the UK 1939 Register for finding Northern Irish kin but access is not straightforward.
What can you find out from the census?
There are a number of forms that were filled in by both households and enumerators. Households filled out forms like the one top left of this page (click to enlarge it.) Names, relationships, ages, county of birth, occupation and religion were recorded along with some information on marriage and children in 1911 and 1926 only. If your ancestor could sign their name, then that will also be on the form which is rather lovely.
Be sure to always check out other household forms too if they are available, as they will contain important geographical information that could help you further your research - see my Irish Census Geography page for more inspiration.
Enumerators also used summary forms to record property details, which means you can find out exactly how many pig houses your farming ancestor had!
There are a number of forms that were filled in by both households and enumerators. Households filled out forms like the one top left of this page (click to enlarge it.) Names, relationships, ages, county of birth, occupation and religion were recorded along with some information on marriage and children in 1911 and 1926 only. If your ancestor could sign their name, then that will also be on the form which is rather lovely.
Be sure to always check out other household forms too if they are available, as they will contain important geographical information that could help you further your research - see my Irish Census Geography page for more inspiration.
Enumerators also used summary forms to record property details, which means you can find out exactly how many pig houses your farming ancestor had!
1926 Irish Census return for William Empson Jones of Woodside, Hacketstown, Co. Carlow (c) NAI. Click to enlarge.
Where are Irish censuses available online?
1926
The National Archives of Ireland have released the 1926 Irish census freely and exclusively on a dedicated website. The 1901 and 1911 censuses can be searched on a similarly styled separate website (see below.) This may change to become a single website in the future, but I would hope that there would a redirect for the 1926 link (or maybe not knowing the NAI!)
Ancestry has been quick to get in on the act with Ireland, 1926 Census of the Irish Free State (Anc=£). This collection appears to have been created with data sourced from the NAI under Creative Commons, so no separate independent indexing. When you click through to view the record, you are taken straight to the Household Return image as pictured above - see my note below about the URL though before you gleefully start creating source citations with it.
The NAI search screens are fairly straightforward and once you have a list of candidates, you can refine the selection further with other indexed information using the filters on the left hand side of the results screen. The Household returns (Form A), look very much like those used in 1911 with some changes,
Claire Bradley has written a couple of great blog pieces on her first impressions and advice for reporting errors. On the latter point, I've come across a fair few transcription errors and have not found a few households I would have expected to have found, perhaps because of more transcription errors or maybe missing records. Witness the various scribbles that have overwritten the form above for instance, especially the liberal use of green ink. This may have confused the AI bot no doubt used to create the indexes and especially appears to affect ages. Hopefully, when the feedback mechanism is working well, we can all contribute to correcting errors and improving the search experience and results for everyone, just like we all do with the 1901 & 1911 data.
One annoying bugbear that I have noted though is that the URL that appears when you click through to any form image is a temporary one. If you cut and paste it into your source citations, it will effectively timeout and you will get an ugly error message if you try to use it again. I do hope they sort this out and implement permanent links as they seem to have done with the 1901 and 1911 census images. In the meantime, if you view the household record transcription and click on the head of the household, the URL that shows up at the top of the page can be used to retrieve the right record again.
1926
The National Archives of Ireland have released the 1926 Irish census freely and exclusively on a dedicated website. The 1901 and 1911 censuses can be searched on a similarly styled separate website (see below.) This may change to become a single website in the future, but I would hope that there would a redirect for the 1926 link (or maybe not knowing the NAI!)
Ancestry has been quick to get in on the act with Ireland, 1926 Census of the Irish Free State (Anc=£). This collection appears to have been created with data sourced from the NAI under Creative Commons, so no separate independent indexing. When you click through to view the record, you are taken straight to the Household Return image as pictured above - see my note below about the URL though before you gleefully start creating source citations with it.
The NAI search screens are fairly straightforward and once you have a list of candidates, you can refine the selection further with other indexed information using the filters on the left hand side of the results screen. The Household returns (Form A), look very much like those used in 1911 with some changes,
- Provision was made to express exact ages in years and months - not everyone did and of course, not all told the "truth"!
- Birthplace asked for townland and county - oh, that they had thought to do that for 1901 and 1911 censuses too * sigh *.
- Length of current marriage was asked for in years and months - married woman only were supposed to answer this question, but helpfully widows often filled in the information too.
- Number of children born to the marriage was asked for but not how many were still living.
- However, the last column asked for how many children and step-children under the age of 16 were still living, whether they were living in the household or elsewhere. A bit more of a nuanced question and one I suspect was often misunderstood perhaps, so take care with the answers.
- For persons with land, the number of statute acres was asked for, which makes me think of land deeds and leases to be found.
- More precise address information can sometimes be found on the far-right of the form in the boxes at right-angles.
Claire Bradley has written a couple of great blog pieces on her first impressions and advice for reporting errors. On the latter point, I've come across a fair few transcription errors and have not found a few households I would have expected to have found, perhaps because of more transcription errors or maybe missing records. Witness the various scribbles that have overwritten the form above for instance, especially the liberal use of green ink. This may have confused the AI bot no doubt used to create the indexes and especially appears to affect ages. Hopefully, when the feedback mechanism is working well, we can all contribute to correcting errors and improving the search experience and results for everyone, just like we all do with the 1901 & 1911 data.
One annoying bugbear that I have noted though is that the URL that appears when you click through to any form image is a temporary one. If you cut and paste it into your source citations, it will effectively timeout and you will get an ugly error message if you try to use it again. I do hope they sort this out and implement permanent links as they seem to have done with the 1901 and 1911 census images. In the meantime, if you view the household record transcription and click on the head of the household, the URL that shows up at the top of the page can be used to retrieve the right record again.
Click to go to website
However (drum roll!), the best new feature of the 1926 census is the ability to search via a MAP! Click on the map of Ireland on the homepage (or click on the image to the right) and you will be taken to a lovely full page interactive map that you can zoom in on. Clock the age/sex pyramid and the religion pie-chart on the right hand side too.
Choose a county and zoom in to reveal the District Electoral Divisions (DEDs) that were used to sub-divide them for the censuses. Click on one of them and the pyramid and pie-chart will change too. Zoom in further and a contemporary OS map is revealed.
However, you are inevitably searching for people in households, so here is how to find them, especially if they are hiding behind transcription errors,
One of the other highlights of the map is that there are major institutions plotted - check out the symbols key on the left hand side to identify industrial schools, prisons and mental asylums for example. Zoom in on the map and click on any promising symbol to reveal the name of the institution. Clicking on the "View Details" button will open up a new tab with a list of people. Remember, some institutions, particularly asylums, may have only used initials rather than full names, so you may have to scroll through several pages of census images to find your relative by birthplace perhaps?
Claire Bradley has released a short YouTube video showing you how to do all this interactively which I recommend you watch.
Choose a county and zoom in to reveal the District Electoral Divisions (DEDs) that were used to sub-divide them for the censuses. Click on one of them and the pyramid and pie-chart will change too. Zoom in further and a contemporary OS map is revealed.
However, you are inevitably searching for people in households, so here is how to find them, especially if they are hiding behind transcription errors,
- Look over to the right above the age/sex pyramid and there is a tab for Townlands and a count for how many there are in the DED.
- Click on that tab and a random list of them all will appear with counts of how many people were enumerated in each of them.
- Click on the townland that interests you and the age/sex pyramid and religion pie chart will reappear with the statistics for that townland.
- Click on the "View Townland Records" button above the pyramid and a new window will open up with a list of everyone enumerated in 1926. Although not explicitly flagged, they do appear to be listed together as households.
One of the other highlights of the map is that there are major institutions plotted - check out the symbols key on the left hand side to identify industrial schools, prisons and mental asylums for example. Zoom in on the map and click on any promising symbol to reveal the name of the institution. Clicking on the "View Details" button will open up a new tab with a list of people. Remember, some institutions, particularly asylums, may have only used initials rather than full names, so you may have to scroll through several pages of census images to find your relative by birthplace perhaps?
Claire Bradley has released a short YouTube video showing you how to do all this interactively which I recommend you watch.
1901 & 1911
The early 20th century censuses have been digitised and are freely available via the National Archives of Ireland. You can also access the same images via Ancestry and FindMyPast, taking advantage of their different search interfaces if you have paid for a subscription.
Both Ancestry and FindMyPast have links to the NAI website within each record transcript to access images but currently (APR 2026) these links are still to the older version of the NAI search screen. Unless they do something about upgrading these links, then they will stop working when the NAI phase out the older version as they are saying they will. If that happens, then make a note of whomever you find and use the more up to date free NAI website (link at the top of the above list) to gain access to the images.
c19th
Those surviving fragments from the first half of the 19th century are also available online, but they are very limited in scope - read any descriptions carefully before searching and be lucky!
Also look out for surviving census fragments that have been seized upon by enthusiastic genies, transcribed and made available for others to benefit from. For example, Cavan Townlands has some invaluable data from both the 1821 and 1841 census for selected parishes in the county.
There is another way to access some of the information that was contained in some of those early censuses, albeit in a very limited way. When the old age pension was introduced in 1909, prospective pensioners had to prove they were at least 70 to qualify for it. As civil registration of births did not begin until 1864, another way of gaining this proof was to apply for a search of the 1841 & 1851 censuses (that still existed in the PROI at that time) to locate them as children living with their families.
The early 20th century censuses have been digitised and are freely available via the National Archives of Ireland. You can also access the same images via Ancestry and FindMyPast, taking advantage of their different search interfaces if you have paid for a subscription.
- 1901 and 1911 Irish censuses (NAI) This is the most up to date version of the website and mirrors the 1926 search interface.
- Web: Ireland, Census, 1901 (Anc=£)
- Web: Ireland, Census, 1911 (Anc=£)
- Ireland Census 1901 (FMP=£)
- Ireland Census 1911 (FMP=£)
Both Ancestry and FindMyPast have links to the NAI website within each record transcript to access images but currently (APR 2026) these links are still to the older version of the NAI search screen. Unless they do something about upgrading these links, then they will stop working when the NAI phase out the older version as they are saying they will. If that happens, then make a note of whomever you find and use the more up to date free NAI website (link at the top of the above list) to gain access to the images.
c19th
Those surviving fragments from the first half of the 19th century are also available online, but they are very limited in scope - read any descriptions carefully before searching and be lucky!
Also look out for surviving census fragments that have been seized upon by enthusiastic genies, transcribed and made available for others to benefit from. For example, Cavan Townlands has some invaluable data from both the 1821 and 1841 census for selected parishes in the county.
There is another way to access some of the information that was contained in some of those early censuses, albeit in a very limited way. When the old age pension was introduced in 1909, prospective pensioners had to prove they were at least 70 to qualify for it. As civil registration of births did not begin until 1864, another way of gaining this proof was to apply for a search of the 1841 & 1851 censuses (that still existed in the PROI at that time) to locate them as children living with their families.
What other census substitutes are available?
Given the loss of virtually all of the 19th century population censuses, genealogists have turned to other records to try to bridge that fairly huge gap. Although these are often grouped under the heading "census substitutes", they are much more limited in terms of what you can learn. This is usually limited to an approximation for a head of household in a specific location and the vast majority are male.
19th Century
One very well known census substitute is Griffith's Valuation - check out my page for more information and be sure to look carefully for whatever land-holding actually had a house on it for the best clue as to where the family may have been living. Other holdings may just have been fields. The problem with this source though is that the lands were surveyed over quite a long period and you must be cautious of reading too much into an entry, especially when you are dealing with not uncommon names in the same area.
Similarly, the Tithe Applotment Books and Tithe Defaulters collections that cover some of the earlier decades of the century may give you an idea of heads of households, but suffer from the same problems as Griffith's Valuation.
18th Century
Religious surveys were a hot topic at this time as the ruling minority Protestant classes fretted about the numbers of Catholics in various parishes. There are a few geographically limited sources for the surviving records and you should check the coverage very carefully before searching. Again you will probably just get a name and parish so be very careful with any conclusions you attempt to draw across multiple similarly named generations of men.
Find My Past has a list of Irish census, land and substitutes collections (FMP=£) which might be worth a rummage in if a location piques your interest. You will find gems such as The Census of Elphin, 1749 (FMP=£) and Ireland, 1766 Religious Census (FMP=£). I've been lucky in the latter, but the geographical reach of these collections is very limited. By the way, you can also find a free to browse version of that 1766 religious census in the Virtual Treasury of Ireland.
Given the loss of virtually all of the 19th century population censuses, genealogists have turned to other records to try to bridge that fairly huge gap. Although these are often grouped under the heading "census substitutes", they are much more limited in terms of what you can learn. This is usually limited to an approximation for a head of household in a specific location and the vast majority are male.
19th Century
One very well known census substitute is Griffith's Valuation - check out my page for more information and be sure to look carefully for whatever land-holding actually had a house on it for the best clue as to where the family may have been living. Other holdings may just have been fields. The problem with this source though is that the lands were surveyed over quite a long period and you must be cautious of reading too much into an entry, especially when you are dealing with not uncommon names in the same area.
Similarly, the Tithe Applotment Books and Tithe Defaulters collections that cover some of the earlier decades of the century may give you an idea of heads of households, but suffer from the same problems as Griffith's Valuation.
18th Century
Religious surveys were a hot topic at this time as the ruling minority Protestant classes fretted about the numbers of Catholics in various parishes. There are a few geographically limited sources for the surviving records and you should check the coverage very carefully before searching. Again you will probably just get a name and parish so be very careful with any conclusions you attempt to draw across multiple similarly named generations of men.
Find My Past has a list of Irish census, land and substitutes collections (FMP=£) which might be worth a rummage in if a location piques your interest. You will find gems such as The Census of Elphin, 1749 (FMP=£) and Ireland, 1766 Religious Census (FMP=£). I've been lucky in the latter, but the geographical reach of these collections is very limited. By the way, you can also find a free to browse version of that 1766 religious census in the Virtual Treasury of Ireland.
Where can you find out more about Irish censuses?
For much more background detail, be sure to read John Grenham's highly informative pages on the Irish census records to discover more about the surviving fragments and much more, including what has not been included in the indexing and / or images.
There are also several talks on his Irish Ancestors YouTube channel about Irish censuses that describe the various resources and how to get the best out of them,
For much more background detail, be sure to read John Grenham's highly informative pages on the Irish census records to discover more about the surviving fragments and much more, including what has not been included in the indexing and / or images.
There are also several talks on his Irish Ancestors YouTube channel about Irish censuses that describe the various resources and how to get the best out of them,
(c) Irish Geneaography - 2026
[I-IC&R-Cen]
[I-IC&R-Cen]
