Domesday Book was a property survey, not a census of everyone in England.

A population census aims to count inhabitants systematically. Domesday instead organised information around land, its holders and its value, so the individuals named are overwhelmingly people connected with landholding rather than a representative list of the whole population.

The record helped the king understand resources and obligations after the Norman Conquest. By comparing holdings and values across time, it documented changes in control as well as the productive capacity of estates and the basis of royal revenue.

Domesday remains extraordinarily informative about medieval society, but its purpose creates limits. Information about households, workers and settlements cannot simply be treated as a complete register of named individuals, and absence from an entry does not establish that someone never existed.

The Norman victory of 1066 transformed landholding in England. Nearly twenty years later, William ordered a major inquiry into who held land and what it was worth. Royal commissioners gathered answers from local jurors, creating an unusually extensive account of estates and resources. The questions were directed toward possession, use and value, rather than toward compiling a modern-style list of every resident's name and personal circumstances.

The resulting entries can describe agricultural resources, livestock and other assets associated with an estate. They also record categories of people within rural communities. Such details help historians reconstruct aspects of work, settlement and social hierarchy. However, recording a number of people in a category is not the same as naming and enumerating every individual. The distinction is essential when using Domesday as evidence about the population.

The survey also looked backwards. It included information about landholding and values before and after the Conquest, allowing changes to be compared. That makes it a powerful source for understanding the redistribution of property under Norman rule. At the same time, it was an administrative record produced for royal purposes, not a neutral description designed to answer every question a modern historian might ask about everyday life.

What is usually called Domesday Book survives in two principal parts, Great Domesday and Little Domesday. Little Domesday covers the East Anglian counties of Essex, Norfolk and Suffolk and retains fuller detail than the more compressed Great Domesday. The names can therefore mislead: 'Little' does not mean historically trivial. The surviving record also has geographical gaps, making it unsafe to assume that every English community appears in the same way.

The main text is Latin, with specialised terms and abbreviations reflecting its administrative setting. Translations make it accessible, but interpreting an entry still requires attention to local context and the meaning of its categories. The National Archives specifically warns that it is not usually a suitable source for someone seeking a Norman ancestor. Its wealth of property information should not be mistaken for the kind of comprehensive personal coverage expected from later census records.

The modern word census suggests a count designed to enumerate people. Domesday was primarily concerned with landholding, resources, obligations, and value. People appear because of their relationship to estates and lordship, not because every individual was being recorded on equal terms.

Its omissions and uneven detail are therefore not simply failures to complete a modern population form. They reflect the aims and organization of a royal inquiry. A source can be exceptionally rich while still being unsuitable for questions it was not designed to answer.