How many tribes were there in Australia?

Too many to count. There are so many people emigrating to Australia every year that it's hard to keep up. In the start, of course, there was British, Irish, Scottish, etc. with the first settlers and convicts but as time has gone on more and more cultures have become a part of Australia. There are many Italian families that emigrated during the 1930s, 40s, 50s; multiple Vietnamese refugees that came to Australia during and after the Vietnam War; while today there are Middle Eastern and African refugees joining our country, not to mention all those who choose to move to Australia - English, Americans, Canadians, French, Spanish, etc.

Australia is a multicultural country, with no overall ruling culture.