Canadian Federal Census Dates
In most cases, the following list indicates the official enumeration dates for the various census returns. The actual enumeration of the population took weeks or months. Enumerators were instructed to record the information on the census returns as it existed on the official enumeration date.
| 1825 | Lower Canada (Quebec) taken from June 20 to September 20, 1825 |
| 1831 | Lower Canada (Quebec) taken from June 1 to October 1, 1831 |
| 1842 | Canada West (Ontario) returns were supposed to be completed by February 1, 1842 |
| 1851 | January 12, 1852 (delays led to the late enumeration of the 1851 Census) |
| 1861 | January 14, 1861 |
| 1871 | April 2, 1871 |
| 1881 | April 4, 1881 |
| 1891 | April 6,1891 |
| 1901 | March 31, 1901 |
| 1906 | June 24, 1906 |
| 1911 | June 1, 1911 |
This information was compiled from Library and Archives Canada