A census is the procedure of acquiring information about every member of a given population.
Census records are a unique record of all residents at a specific address at a set time and date.
In the UK, census records were taken every 10 years commencing 1841 until 1901.
The English government took its first national census in 1801.
A census has been taken every ten years since that date, except in 1941.
The first genealogically useful census was not taken until 1841, when names were recorded.