Genealogical Value
The 1851 census is seen as one of the key sources for British genealogical research of the nineteenth century. The information about the relationship of individuals to the head of household enables relationships between people to be established accurately. Furthermore, the inclusion of exact ages and details of each person's place of birth, provides the researcher with a pointer to the location of birth or baptism records. In many cases, this allows the researcher to pin-down the parish of birth with relative ease: in other cases, the situation is not so simple.
An example of the problems encountered is that the census may accurately record a person's place of birth, although their baptism (which may be the only record relating to their birth) may be in a different place. Conversely, a person may have been born and baptised in one place, but brought up in a different place, which is the one they remember as their place of origin and duly record it as such in the census. A further problem is that the information about a household was normally provided to the census enumerator by the head of household—and heads of household varied in the conscientiousness with which they elicited information from each person in the household. In cases where a person was born outside the country, only the country of origin is given (not the location within the country). Hence, for example, there are many people in the English census whose place of birth is given simply as "Scotland".
Read more about this topic: United Kingdom Census 1851