Talk:When was the first Australian census held?

The first Australian census was held in 1911, on the night of 2 April (previous censuses being organised by the colonies) and subsequent censuses were held in 1921, 1933, 1947, 1954 and 1961. In 1961 the five-year period was introduced. Censuses are held on the second Tuesday of August.

https://en.wikipedia.org/wiki/Census_in_Australia