Exploring the 1901 and 1911 census of Ireland

Saturday, January 03, 2026



I recently came across the Irish Surnames Map by Barry Griffin. This website uses census data from the 1901 and 1911 censuses of Ireland and maps them across the island - showing where surnames and forenames are most located. Lots of interesting things to discover!

On that website, I learned there were only 6 people named Adrian living in Ireland in 1901. Not very many, but I suppose the name became more popular in the 20th century. 

Exploring that website led me on to the actual census data websites, run by the National Archives of Ireland. This site includes the 1901 and 1911 census records, and you can search it right down to the individual or household level. I think I found records of my great-great-grandmother and great-grandfather and saw their handwriting (my surname is one of the most common, as were their forenames, so I'm not 100% sure).

You can also search the data by origin. Within Ireland, that means which county they are from. Outside Ireland, it means country. 

Ireland is now a very multinational and multicultural country. There's often some kind of belief that this is all new, but these records show that people from outside Ireland have lived here for more than a century.

I find all manner of interesting records. Here are some highlights.


These are just 10 examples from the thousands, if not millions, of interesting stories found in the 1901 and 1911 census. Anyone can explore these census records online via the National Archives of Ireland.

Ireland's census history is patchy. After 1901 and 1911, the next scheduled census was 1921, but this was cancelled due to war. A census was held in 1926, the first after Irish independence. Now, 100 years later, the records from the 1926 census will be released in April of this year.