Top 13 Rankings (2005):
- Winner, Kate DeAraugo
- 2nd place, Emily Williams
- 3rd place, Lee Harding
- 4th place, Dan England
- 5th place, Daniel Spillane
- 6th place, Anne Robertson
- 7th place, James Kannis
- 8th place, Milly Edwards
- 9th place, Roxane Lebrasse
- 10th place, Natalie Zahra
- 11th place, Laura Gissara
- 12th place, Chris Luder
- 13th place, Tarni Stephens
Top 12 Rankings (2006):
- Winner, Damien Leith
- 2nd place, Jessica Mauboy
- 3rd place, Dean Geyer
- 4th place, Chris Murphy
- 5th place, Ricky Muscat
- 6th place, Lisa Mitchell
- 7th place, Bobby Flynn
- 8th place, Lavina Williams
- 9th place, Guy Mutton
- 10th place, Klancie Keough
- 11th place, Reigan Derry
- 12th place, Joseph Gatehau
Top 12 Rankings (2007):
- Winner, Natalie Gauci
- 2nd place, Matt Corby
- 3rd place, Carl Riseley
- 4th place, Marty Simpson
- 5th place, Tarisai Vushe
- 6th place, Daniel Mifsud
- 7th place, Ben McKenzie
- 8th place, Jacob Butler
- 9th place, Mark Da Costa
- 10th place, Lana Krost
- 11th place, Brianna Carpenter
- 12th place, Holly Weinert
Starting with Season 6, judge Mark Holden departed, and, for the first time, auditions were to be held in London and Los Angeles, due in part to the success of Aussie ex-pat Michael Johns on American Idol: The Search for a Superstar (2002). However, the L.A. auditions were cancelled due to the judges' scheduling conflicts. Season 6 was also Ricki-Lee Coulter's first season as host, and James Mathison and John Foreman's final season.