In 1963, details of the membership of congregations in The Church of Jesus Christ of Latter-day Saints in the United Kingdom and Ireland took place and was published in The Construction Era. Individual congregations and their membership, which is assumed to be total membership, was published alongside a chart indicating how far it had progressed in the Church Building Programme. A total membership of 29,174 persons was recorded. However, only 150 out of 185 (81.1%) of congregations returned figures. There are ten variables in the dataset: ID, unit name, membership, date, Stake, City, Latitude, Longitude, Easting, and Northing. The data is ready for incorporation into a GIS system.