The first census of the UK was in 1801 and have taken place every 10 years since, however the 1801, 1811, 1821 and 1831 censuses were just a count of the population and so are of negligible interest to genealogists.
- The 1841 census was taken on the night of the 6th June.
- It features question on age and if the person was born within the county, but does not ask about relationships.
- The 1851 census was taken on the night of the 30th March.
- It featured more question about the make up of the family and relationships, as such it is of importance to genealogists
- The 1861 census was taken on the night of the 7th April.
- The 1871 census was taken on the night of the 2nd of April.
- The 1881 census was taken on the night of the 3rd of April.
- This is often considered to me the most useful census as it have been well indexed. A transcript of it can be searched for free at familysearch.org
- The 1891 census was taken on the night of the 5th April.
- The 1901 census was taken on the night of the 31st March.
- This was the last UK census to be fully released
- The 1911 census was taken the 2nd of April.
- Whilst not released information on this census is available under the Freedom of Information Act.
- The 1921 census was taken on the 19th June.
- This census will not be available until 2022.
- The 1931 census was taken on the 26th of April.
- All the information from this census was destroyed in World War Two
- The 1941 census was not taken due to World War Two
- The 1951 census was taken on the 8th of April.
- This census will not be available until 2052.
- The 1961 census was taken on the 23rd of April.
- This census will not be available until 2062.
- The 1971 census was taken on the 25th of April.
- This census will not be available until 2072.
- The 1981 census was taken on the 5th of April.
- This census will not be available until 2082.
- The 1991 census was taken on the 21st of April.
- This census will not be available until 2092.
- The 2001 census was taken on the 29th of April.
- This census will not be available until 2102, and it is believed that some people living on farms were not counted due to restrictions in place at the time due to foot and mouth.
The first census of Canada was in 1666 and and was done by Intendant Jean Talon. The census counted the colony's 3,215 inhabitants and recorded their age, sex, marital status and occupation. In light of the need for information to help plan and develop the Colony of New France, Talon did much of the data collection personally, visiting settlers throughout the colony.
The years leading up to 1871 (Canada's first national census) saw a long string of 98 colonial and regional censuses. During this period, notably in enumerations between 1710 and 1760, there was a particular need to collect information on housing stock and armaments such as muskets and swords owned by households. Previous censuses had been more concerned with raising taxes or armies and assessing resources.
Later, as other needs arose, questions were added on livestock, crops, buildings, churches, grist mills and firearms. In 1765 for example, priorities included assessing the balance between Catholics and Protestants, and recording the number of Acadians, settlers, Indians and Blacks. As a result of this census, new variables that included questions on race, religion and ethnic origin were introduced.
- The 1871 census was taken on .
- It featured 211 questions on area, land holdings, vital statistics, religion, education, administration, the military, justice, agriculture, commerce, industry and finance. It only counted the population of the four original provinces of Nova Scotia, New Brunswick, Quebec and Ontario. Not every household answered all 211 questions.