List of The X Factor (Australian TV series) finalists

The X Factor is an Australian television reality music competition that first aired in 2005. As of 2015, there have been seven seasons; one on Network Ten and six on the Seven Network. The final round of the competition features a number of solo singers and vocal groups: nine for season 1, twelve for seasons 2, 3, 4, 5, 7 and 8, and thirteen for season 6. A total of 94 acts have reached the finals of their seasons. Season three winner Reece Mastin is the most successful contestant from the show, having attained two top-five albums and three number-one singles, with nine platinum and three gold certifications.

During season 1, the contestants were split into three categories: 16-24s (soloists aged 16 to 24), Over 25s (soloists aged 25 and over) and Groups (including duos). Each category was mentored by Mark Holden (head judge), Kate Ceberano and John Reid. From season 2 onwards, the 16-24s category was split into separate male and female sections, making four categories in all: Boys, Girls, Over 25s and Groups. The judging panel was replaced by Guy Sebastian (head judge), Natalie Imbruglia, Ronan Keating and Kyle Sandilands who is the additional fourth judge. In season three, Natalie Bassingthwaighte and Mel B joined the judging panel as replacements for Imbruglia and Sandilands. Dannii Minogue and Redfoo (head judge) replaced Mel B and Sebastian in season 5. In series 5, the over 25s were changed to over 24s, before being changed back to over 25s for series 6. Sebastian (head judge) returned in season 7 along with Chris Isaak and James Blunt to replace Redfoo, Bassingthwaighte and Keating. In season 8, boys and girls has been defunct and making the 14-21s to come back, the over 25s category was changed to over 22s. Mel B returned in 8 along with Iggy Azalea and Adam Lambert to replace Minogue, Issak and Blunt.

As of season 8, each five categories have won the show on at least one occasion, while six of the show's fifteen judges have had the winning act in their category at least once, with Sebastian and Keating winning twice, and Holden, Minogue, Isaak and Lambert winning once. The judges not to win were Reid, Cebrano, Imbruglia, Sandilands, Bassingthwaighte, Mel B, Redfoo, Blunt and Azalea with Bassingthwaighte placing runner-up in 2011 and 2014 (the first and the fourth of her four years on the panel), Reid, Imbruglia, Brown and Blunt placing runner-up in 2005, 2010, 2012 and 2015 respectively (their only season), Cebrano and Sandilands’ best performance having their contestant being the last eliminated in 2005 and 2010 respectively (their only season), Redfoo’s best performance having his contestant being the ninth eliminated in 2014 (the second of his two years on the panel) and Azalea’s best performance having her contestant being the third eliminated in 2016 (her only season).

Contestants
Key:
 * – Winner
 * – Runner-up
 * – Disqualified