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 dataset contains vital statistics of births, marriages and deaths. All the relevant background material is incorporated either in the documentation files or in the scanned images of the tables of contents, prefaces, and notes in the original source. The main vital statistics tables are: Total number of marriages, births, illegitimate births and deaths grouped by counties and gender. Total number of deaths grouped by counties, gender and age groups. Total number of deaths grouped by counties, cause of death, gender and age groups (1952-1971) Republic of Ireland only. Total number of infant deaths grouped by counties, gender and age groups (1950-1971). Total number of neonatal deaths grouped by counties and cause of death (1943-1949) Republic of Ireland only. Total number of marriages grouped by counties, gender and age groups (1948-1971) Northern Ireland only (1957-1971) Republic of Ireland only. Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.