Like England and Wales, the Scottish census gathered data on numbers of rooms (specifically, rooms with windows) from 1891 onwards, but the reports for 1891 and 1901 tabulate only the total number of rooms for each reporting area, so it is impossible to calculate numbers living in overcrowded conditions. This study comprises extensive although not always complete transcriptions of the housing density (persons per room) tables from the Scottish censuses of 1911, 1931, 1951, 1961 and 1971, cross-tabulating numbers of persons versus numbers of rooms. The 1921 reports do include similar data for Scottish counties, but these have not been computerised. To obtain a free account please register with the UKDA.