Religions in Australia, 1996 Census The table below is based on self-identification, i.e., what respondents indicated their religion was in the 1996 Australian census. This was the only optional question on the census. Respondents were asked to mark one of the seven specified religions (Catholic, Anglican, Uniting Church, Presbyterian, Greek Orthodox, Baptist, or Lutheran) or to specify a particular religion. Persons with no religion were asked to mark the no religion box. Many of the "religions" here are not single organizations but are classifications or categories of related faith groups. A wider variety of responses (including dozens of distinct Christian denominations) have been summarized in this table, based on the "major religions" defined in the "Major Religions of the World" list. (The one exception to this is that Australian Aboriginal traditional religion has been left as is, rather than being grouped with "Animism" into the "primal-indigenous" category. It is quite possible that the 727 people who listed their religion as "Animism" are, in fact, adherents of Australian aboriginal religion.) Because the Christianity category includes so many different groups, the "Top 15 Christian Denominations" are provided in a separate table. [The "Levels of Classification of Faith Groups" provides further information on the definition of "religion" and "denominational family" as used here.]

Interestingly enough, of the 22 "major religions of the world" listed by Adherents.com's summary page, all but three (Juche, Jainism and Yoruba religion) are found in Australia, according to this census. Of the 12 "classical world religions," all but Jainism are present in Australia. Nevertheless, there are small organized Jain groups in Australia, but they are not listed in the census data we obtained. Perhaps they are grouped among Hindus.

More http://www.adherents.com/loc/loc_australia.html

Note: I don't think 2001 census is yet published online as at January 2003