The National Archives of Ireland has made the Irish Census of 1901 available online from today.
On the website, people will be able to view the Census and perform a variety of searches under forename, surname and county as well as more advanced searches including religion, occupation, Irish language proficiency, specified illnesses and literacy status.
The website was launched in December 2007 and the entire 1911 Census has been available online since 2008.
The 1911 census was prepared first because the quality of the microfilm used to digitise the images is better than the microfilm of 1901 as well as the fact that there are much more microfilm reels available for 1911 than 1901.
A research partnership between the National Archives of Ireland and Library and Archives Canada has helped facilitate the digitisation, indexing and contextualisation of the 1901 and 1911 Census records to preservation standard.
The digitisation of the equivalent records for England, Wales and Scotland has proved hugely popular with users, as has the digitisation of Canadian and US Census records.
Since the 1911 Census was put on the internet three years ago, just under seven million visits have been recorded to the website.
The images and databases are enhanced by contextual material consisting of historical commentary, photographs, digitised documents from the period from Ireland and Canada and links to relevant scholarly and genealogical sites.