Census returns are often the first historical record a family historian meets. A census return places a whole household together on a single night, with names, ages, birthplaces and occupations side by side. To read one well, you need to know what each column can and cannot tell you.
What a census return is
A census is an official count of the population taken on a fixed date. In many countries it has been held every ten years since the nineteenth century. Enumerators visited each household and recorded the people present that night on a printed schedule. Most countries close individual returns to the public for many decades, so the most recent ones you can see usually date from several generations ago.
Census return columns, one by one
Layouts change from country to country and from one census to the next, but the core columns are similar.
Address
The street, house name or number, and sometimes only the village. Rural addresses can be vague, so note the enumeration district and page number too; they help you find neighbours and return to the same spot later.
Name and relationship to head
Each person is listed with their relationship to the head of household: wife, son, daughter, lodger, servant, visitor. This column often reveals in-laws, grandchildren or a widowed parent living with the family.
Age and marital status
Ages give an estimated birth year, but treat them as approximate. People rounded ages, misremembered them, or gave a younger figure. In some early censuses adult ages were deliberately rounded down to a multiple of five.
Occupation
Job titles point to other records: apprenticeship papers, trade directories, union membership or military service. Old terms can be unfamiliar, so keep a glossary of historic occupations nearby.
Birthplace
Perhaps the most useful column, because it tells you where to look for a baptism or birth record. Compare the birthplace across several censuses. It may change because the person answered differently or the enumerator misheard.
Reading between the lines
- A gap of four years or more between children's ages may hide a child who died young or was living elsewhere.
- The children's birthplaces, read in order, trace the family's moves.
- Neighbours are often relatives, so read a few pages either side of your family.
- Visitors and lodgers sometimes turn out to be cousins or future spouses.
Why spellings change
The enumerator wrote what he heard, often from a neighbour or child if the adults were out. Later, transcribers read handwriting that could be faint or cramped. When a search fails, try:
- Phonetic variants of the surname.
- Searching by first name, age and birthplace without a surname.
- Browsing the street page by page if you know the address.
Recording what you find
Transcribe every person in the household, not only your direct ancestor, and copy the column headings exactly. Note the census year, piece or reel number, folio and page so anyone can find the image again. Save a copy of the image itself, because transcriptions can contain errors.
A quick checklist
- Full household transcribed with column headings.
- Estimated birth years worked out for each person.
- Birthplaces compared with other census years.
- Reference numbers saved with the image.
- Neighbouring pages checked for relatives.
Where to go next
Use the birthplaces and ages to search for baptisms, births and marriages, then go back to the previous census to see the household ten years earlier. If a birthplace will not turn up in the indexes, old maps and gazetteers show which parish or county it belonged to at the time, and the homepage section on where historical records come in shows how census entries fit alongside DNA evidence. Many national archives publish census indexes free online; subscription platforms such as MyHeritage also host census collections alongside trees, so compare what each source covers for your region.
