The purpose of the project was to provide machine-readable economic and social history statistics relating to the whole of Ireland for the period 1821-1971. Further information about the project is available on the QUB Centre for Data Digitisation and Analysis website. The main tables are: Total population grouped by baronies and gender. Also includes the area of each barony (1821-1891). Total population grouped by electoral divisions and gender. Also includes the area and valuation of each electoral division (1841-1861). Total population grouped by poor law unions and gender. Also includes the area and valuation of each poor law unions (1841-1901). Total population grouped by poor law unions and counties and gender. Also includes the area and valuation of each poor law unions (1841-1901). Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.