| 2005 AFL premiership season | |
|---|---|
 | |
| Date | 2–24 September 2005 |
| Teams | 8 |
| Premiers | Sydney 4th premiership |
| Runners-up | West Coast (4th grand final) |
| Minor premiers | Adelaide 1st minor premiership |
| Attendance | |
| Matches played | 9 |
| Total attendance | 480,064 (53,340 per match) |
| Highest | 91,828 Grand Final, West Coast vs. Sydney) |
The Australian Football League's 2005 finals series began on the weekend of 2 September 2005 and ended with the 109th AFL Grand Final at the Melbourne Cricket Ground on 24 September 2005. The Sydney Swans defeated West Coast, breaking their record 72-year drought between premierships. The top eight teams on the home and away rounds (regular season) ladder qualify for the Finals Series.