List of Big Brother (Australian TV series) housemates

Big Brother is an Australian reality television show, and is the Australian version of the Big Brother franchise. Contestants are referred to as "housemates," and live together in a specially constructed house that is isolated from the outside world. The housemates are continuously monitored during their stay in the house by live television cameras as well as personal audio microphones. Throughout the course of the competition, housemates are evicted from the house. The last remaining housemate wins the competition and is awarded a cash prize. The series began airing in 2001, and as of 2023, 15 seasons and 2 spin-off seasons have been broadcast.

As of Big Brother 15, there have been a total of 291 civilian housemates, 12 Celebrity Big Brother housemates and 12 Big Brother VIP; 10 of which have been housemates on two seasons. There have been 14 winners of Big Brother; ten men and three women (with one woman winning twice), while the winners of Celebrity Big Brother and Big Brother VIP were both men. The youngest winner is Aleisha Lee Cowcher, who was 20 at the time of winning Big Brother 7, and the oldest is Terri Munro, who was 52 when she won Big Brother 8.

Housemates
Key
 * Winner
 * Runner-up
 * Third place
 * Walked
 * Ejected
 * Housemate entered for the second time



Spin-off housemates
Key
 * Winner
 * Runner-up
 * Third place
 * Walked
 * Ejected
 * Housemate entered for the second time