1901and1911
All 32 counties. Census nights 31 March 1901 and 2 April 1911.
The only full censuses of the whole island to survive from before independence. Earlier returns were destroyed or pulped, so for most families these are the oldest household records there are.
About 8.7 million people across both years, with names, ages, relationships, occupations, religion, birthplace, literacy and marital status, as written on the night. The National Archives has made both free to search online since 2007 (1911) and 2009 (1901).
- Can these records be used?
- Yes. They are public records, open to inspection since 1961, and everyone listed has long since died, so they are historical record rather than personal data about living people.
- Where does the data come from?
- The National Archives of Ireland's transcriptions of each household return (Form A). We built our own dataset from them. The matching, place-finding and artwork are our own work.
- Do you change anything?
- Not in the record itself. Names, ages and answers stay as transcribed. We add a simplified search key for each surname and suggest spelling variants (Kelly and Kelley, say) that you can choose to include.
- Do you keep copies of the original forms?
- No. The scan is loaded from the National Archives when you open it, and every household links back to its record there.
- How exact is the map?
- Each household is matched to its district and, where we can, its townland. Boundaries have been redrawn many times since, so the placement is a best estimate from the historic boundary records available, not a surveyed address.
- What do I pay for?
- Only the print or digital artwork you order. Searching, browsing and reading household details need no account and no payment.