Census 1926: A History of Census in Ireland

The significance of the public release of the 1926 Census returns in April 2026 is magnified by the fact that so few earlier Irish census returns survive. While census-taking in Ireland stretches back to the early nineteenth century, the history of the records themselves is marked by loss, destruction and chance survival.

The first census of Ireland was conducted in 1813 under the supervision of the Grand Juries, but it was incomplete and never presented to Parliament. Under the Census (Ireland) Act 1815 full population counts became established as a decennial exercise from 1821 onwards. The census of 1841 was particularly significant, not only because it was the last conducted before the devastation of the Great Famine, but also because it marked the first use of the Dublin Metropolitan Police and the Irish Constabulary as enumerators. The widespread deployment of the new police forces, fully established by 1836, made it feasible to conduct the census at townland level on a single night, reducing risks of omission and double counting. While the accuracy of the 1841 census has often been called into question, and its population total likely an underestimate, this sweeping set of social statistics provides an unparalleled portrait of a people on the cusp of profound demographic and social change.

As the decades passed, census returns accumulated into a vast body of documentation that occupied enormous amounts of storage space. Before the establishment of the Public Record Office of Ireland (PROI) in 1867, these records were dispersed across a range of unsuitable locations, including Dublin Castle, the Custom House and numerous courthouses across the country. None of these buildings had been designed for the preservation of archival material, leaving the records vulnerable to fire, flood, damp, and vermin. Under the terms of the Public Records (Ireland) Act 1867, records more than 20 years old were to be transferred to a purpose-built repository within Dublin's Four Courts complex. From the outset, however, it was clear that the building could never comfortably accommodate the ever-expanding volume of documentation generated by the British administration in Ireland.

Some efforts were made to reduce the bulk of the public record. The 1821 census, for instance, was transcribed into summary registers under the auspices of the Clerks of the Peace before being deposited in the PROI in 1869. Pressures on storage space intensified after 1847 with the annual collection of agricultural statistics, the records of which were often expressed in tonnage. Stored initially in the Custom House, even a partial transfer of the census and agricultural statistics to the new Record Treasury horrified the Deputy Keeper, who found that they occupied almost half of the vast basement. Concerned that the ever-increasing records would overwhelm available capacity, the Deputy Keeper sought the opinion of the Solicitor-General on the long-term value of the census returns. The legal advice was that they constituted ‘privileged communications’ and, as such, inadmissible as evidence in court proceedings. Following this ruling, their destruction was permitted once they had served their administrative purpose. Thus the history of census records and their management becomes somewhat obscure until 1896, when the Deputy Keeper acknowledged their extensive genealogical use but noted that the household returns for the 1861 and 1871 censuses had already been destroyed.

The survival of the earlier censuses was largely a matter of chance. The household returns for 1841 and 1851, also considered ‘privileged communications,’ acquired a new administrative value following the introduction of the Old Age Pensions Act in 1908 when they were recategorised as a source of official identification. The household returns for 1881 and 1891, however, are generally believed to have been pulped during the First World War as part of Britain’s wartime paper-recycling measures. And so, by 1922, the PROI held the household returns for only the first five Irish censuses. Most were destroyed in the Four Courts explosion during the opening salvo of the Irish Civil War in June 1922, leaving only a small fragmentary remnant to survive into the present day. 

The 1926 Census is a vital resource for understanding Irish society during a during a pivotal transitional period. Its richness is all the more significant because of absences in other official records that can have such profound implications for social memory, civil rights, restorative and transitional justice, citizenship, social welfare and redress for historical abuse. We are grateful to the Central Statistics Office for its custodianship of this important statistical heritage and to the National Archives of Ireland for making the returns freely accessible. The articles in this series demonstrate just some of the many ways in which the census can enrich our understanding of Ireland's past and generate new discoveries for generations to come.