census
noun [ C ]
uk/ˈsensəs/ usan occasion when people or things are officially counted, especially when the people in a country or particular area are counted and general information about them is recorded. The report listing this information is also called a census:
national/state/government census According to the state census, 89.6% of eligible Hispanics voters were registered.
carry out/conduct/perform a census A national census is carried out every ten years.
Data on the number of commuters was collected in a traffic census.
The census of 1901 is now available to be searched online.