Population censuses / by-censuses in Hong Kong are conducted by the Census and Statistics Department (C&SD) of the Hong Kong SAR Government. The aim is to provide up-to-date benchmark statistics on the demographic and socio-economic characteristics of the population and on its geographical distribution. Since 1961, a population census has been conducted in Hong Kong every 10 years and a by-census in the middle of the intercensal period. The last census, 2021 Population Census in Hong Kong was conducted by C&SD from 23 June to 4 August 2021.