census of Ireland#built up area

• May 1813 (Failed due to lack of returns and organisation)
• 1821 (Failed due to lack of returns and organisation)
• 1831
• Sunday 6 of June 1841
• 1851
• 1861
• 1871
• 1881
• Sunday, 5 April 1891
• Sunday, 31 March 1901
• Sunday, 2 April 1911
• Sunday, 24 April 1921 (Never taken due to Irish War of Independence)

• Sunday, 18 April 1926{{cite web |title=Census through History |url=https://www.cso.ie/en/census/censusthroughhistory/ |website=Central Statistics Office |access-date=9 July 2023}}
• Sunday, 26 April 1936
• Sunday, 12 May 1946
• Sunday, 8 April 1951
• Sunday, 8 April 1956
• Sunday, 9 April 1961
• Sunday, 17 April 1966
• Sunday, 18 April 1971
• Sunday, 1 April 1979
• Sunday, 5 April 1981
• Sunday, 13 April 1986
• Sunday, 21 April 1991
• Sunday, 28 April 1996
• Sunday, 28 April 2002{{efn|Originally planned for April 2001, the census was delayed to 2002 due to the 2001 foot-and-mouth outbreak which affected Northern Ireland }}{{cite web|url = https://unece.org/fileadmin/DAM/stats/documents/ece/ces/ge.41/2000/files/Ireland/Information%20about%20the%20census%202002.pdf | publisher = United Nations Economic Commission for Europe | title = Census of Population - Sunday 28 April 2002 - Information about the Census | accessdate = 4 April 2024 }}
• Sunday, 23 April 2006
• Sunday, 10 April 2011
• Sunday, 24 April 2016
• Sunday, 3 April 2022{{efn|Originally planned for April 2021, the census was delayed to 2022 as part of the government's response to the COVID-19 pandemic in Ireland }}{{cite news |last1=Delmer |first1=Niamh |last2=Keena |first2=Colm |title=Census 2022 to be completed tonight as special measures taken to include refugees |url=https://www.irishtimes.com/news/ireland/irish-news/census-2022-to-be-completed-tonight-as-special-measures-taken-to-include-refugees-1.4843375 |access-date=9 July 2023 |work=The Irish Times |date=3 April 2022}}

Under Article 16 of the Constitution of Ireland, revisions of Dáil constituencies by the Oireachtas are required at a minimum every 12 years. However, they must also have due regard to changes in the population.{{cite web |title=Constitution of Ireland |url=https://www.irishstatutebook.ie/eli/cons/en/html#article16 |website=Irish Statute Book |date=9 July 2023}} Under the Electoral Reform Act 2022, the Electoral Commission is required to conduct a review of constituency boundaries after every census. From 1997 up to the establishment of the Electoral Commission in 2023, this function was carried out by a Constituency Commission created for this function.

From 1971 to 2006, census towns were "defined as a cluster of 50 or more occupied dwellings where, within a radius of 800 metres, there was a nucleus of 30 occupied dwellings". From 2016, a new census settlement was defined "as a minimum of 50 occupied dwellings, with a maximum distance between any dwelling and the building closest to it of 100 metres, accompanied by evidence of an urban centre". For the 2022 census, the CSO developed a new urban geography term the Built Up Area (BUA) to define urban areas.{{cite web |title=Census 2022 Urban Boundaries and Built Up Areas |url=https://www.cso.ie/en/census/census2022/census2022urbanboundariesandbuiltupareas/ |website=CSO |access-date=9 July 2023}}

All Free State Censuses survive, only the 1901 and the 1911 Census (which were released in the 1961 by order of the Minister of Justice, Oscar Traynor to compensate the loss of earlier records){{Cite web |title=Access To Old Records - CSO - Central Statistics Office |url=https://www.cso.ie/en/census/aboutcensus2011/accesstooldrecords/ |access-date=2025-05-20 |website=www.cso.ie |language=en}} are currently public due to Section 35, of the 1993 Statistics Act which bans the release of census return forms until 100 years after the enumeration date.{{Cite web |title=Search the Census {{!}} The National Archives of Ireland |url=https://nationalarchives.ie/collections/search-the-census/ |access-date=2025-05-20 |website=National Archives |language=en-US}}

Due to the explosion in the Public Record Office in Dublin during the Irish Civil War in 1922, the 1813-1851 census were destroyed except for a few enumerators books and transcribed records (which were recovered from the wreckage and donated). Furthermore, all censuses from 1861-1891 were deliberately destroyed, the 1861-1871 were destroyed for the protection of privacy. Furthermore, in 1918, due to a paper shortage, the 1881-1891 were pulped, against the request of the staff at the Public Record Office in Dublin.{{Cite web |title=Access To Old Records - CSO - Central Statistics Office |url=https://www.cso.ie/en/census/aboutcensus2011/accesstooldrecords/ |access-date=2025-05-20 |website=www.cso.ie |language=en}}

There is an active attempt at recovering these censuses and re-constructing them with the Virtual Record Treasury of Ireland. In July 2025, "over 200,000 names" are to be released by the VRTI.{{Cite web |title=Gleanings from the censuses of Ireland, 1813-1851 |url=https://www.virtualtreasury.ie/curated-collections/census-gleanings |access-date=2025-05-20 |website=Virtual Treasury |language=en}}

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• [https://www.cso.ie/en/census/ Census page on the CSO website]
• [https://nationalarchives.ie/collections/search-the-census/ Census page on the National Archives of Ireland]
• [https://www.virtualtreasury.ie/curated-collections/census-gleanings Recovered censuses from the Virtual Record Treasury of Ireland]

{{Census in Ireland}}