The history of population censuses in Hong Kong can be traced back to the 1840s. According to early government records, the first set of census results were published in the 2nd issue of H.K. Govt. Gazette (1841 May). Regular population censuses have been taken ever since, except for the main gap between 1931 and 1961. In addition to population censuses, other statistics like number of ships entered, trade tonnage, public revenue and expenditure, death rate for European and American residents, number of schools, school attendance, number of prisoners and police strength were collected through various government departments in a scattered fashion. In 1947, a Department of Statistics was set up under
W. G. Wormal to organize a statistical system, working on such matters as retail price index and trade statistics. With the abortion of the idea of a population census scheduled for 1948 due to great fluctuations in the population in those few years, the Department of Statistics was disbanded in 1952. In its place a Statistics Branch was set up in the then Commerce and Industry Department headed by
C. T. Stratton. Its work mainly concentrated on economic statistics, in particular trade statistics. In 1959, following the decision to hold a population census in 1961, a temporary Census Department was set up with
K. M. A. Barnett as Commissioner. It was disbanded in 1962 after the completion of the census operation. In 1963, Barnett was appointed Commissioner of Census and Statistical Planning in an office forming part of the then Colonial Secretariat with the immediate task of preparing a report on the statistics in Hong Kong and subsequently the further task of conducting a by-census in 1966. It was only following recommendations made by Barnett that the Census and Statistics Department was formally established in 1967 December. == Major historical events ==