| Club: | Adelaide United |
| Season: | 2005–06 |
| Manager: | John Kosmina |
| Stadium: | Hindmarsh Stadium, Adelaide |
| League: | A-League |
| League Result: | 1st |
| Cup1: | A-League Finals |
| Cup1 Result: | Preliminary Final |
| Cup2: | Pre-Season Challenge Cup |
| Cup2 Result: | Group Stage |
| League Topscorer: | Carl Veart (7) |
| Season Topscorer: | Carl Veart (7) |
| Highest Attendance: | 15,104 vs. Sydney FC (12 February 2006) |
| Lowest Attendance: | 5,263 vs. Perth Glory (22 July 2005) |
| Average Attendance: | 10,947 |
| Prevseason: | 2003–04 |
| Nextseason: | 2006–07 |
The 2005–06 Adelaide United FC season was the club's second season since its establishment in 2003. The club participated in the A-League for the first time after the National Soccer League was replaced.
Continuing their good form from the final season of the NSL, Adelaide United finished as Premiers in the inaugural season of the Hyundai A-League.
The Reds were bundled out of the finals race in straight sets losing to Sydney FC in the two leg semi final and then Central Coast Mariners 1–0 in the preliminary final at Hindmarsh.
| No. | Position | Player | Transferred from | Type/fee | Contract length | Date | Ref | |
|---|---|---|---|---|---|---|---|---|
| 2 | Unattached | Undisclosed | 3 years | 1 July 2005 | ||||
| 1 | Undisclosed | 4 years | 1 July 2005 | |||||
| 18 | Unattached | Undisclosed | 6 years | 1 July 2005 | ||||
| 4 | Undisclosed | 4 years | 1 July 2005 | |||||
| 10 | Undisclosed | 2 years | 1 July 2005 | |||||
| 16 | Free | 1 year | 1 July 2005 | |||||
| 21 | Undisclosed | 3 years | 1 January 2006 | |||||
| 14 | Unattached | Undisclosed | 1 year | 1 January 2006 | ||||
| 3 | Unattached | Undisclosed | 1 year | 1 January 2006 |
| No. | Position | Player | Transferred to | Type/fee | Date | Ref |
|---|---|---|---|---|---|---|
| — | Retired | 1 July 2005 | ||||
| 16 | Free | 1 February 2006 | ||||
| Name | A-League | Pre-Season Challenge Cup | OFC Club Championship | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Goals | Goals | Goals | Goals | ||||||||||
| 1 | GK |  Daniel Beltrame< | --A-League--> | 14 | 0 | 3 | 0 | 2 | 0 | 19 | 0 | ||
| 2 | DF | Richie Alagich< | --A-League--> | 18+5 | 0 | 3 | 0 | 2 | 0 | 28 | 0 | ||
| 3 | DF | Kristian Rees< | --A-League--> | 15+7 | 1 | 3 | 0 | 0 | 0 | 25 | 1 | ||
| 4 | DF | Angelo Costanzo< | --A-League--> | 24 | 0 | 3 | 0 | 2 | 0 | 29 | 0 | ||
| 5 | DF | Michael Valkanis< | --A-League--> | 24 | 3 | 3 | 2 | 2 | 0 | 29 | 5 | ||
| 6 | MF | Ross Aloisi< | --A-League--> | 23 | 2 | 3 | 1 | 2 | 0 | 29 | 3 | ||
| 7 | MF | Lucas Pantelis< | --A-League--> | 13+4 | 1 | 1 | 0 | 0+2 | 0 | 20 | 1 | ||
| 8 | FW | Carl Veart< | --A-League--> | 23 | 7 | 3 | 0 | 2 | 0 | 28 | 7 | ||
| 9 | DF | Matthew Kemp< | --A-League--> | 11+2 | 0 | 2+1 | 0 | 2 | 0 | 18 | 0 | ||
| 10 | FW |  Fernando< | --A-League--> | 17+1 | 7 | 0 | 0 | 0 | 0 | 18 | 7 | ||
| 11 | MF | Louis Brain< | --A-League--> | 6+11 | 3 | 0 | 0 | 0+2 | 0 | 19 | 3 | ||
| 12 | FW | Chad Bugeja< | --A-League--> | 1+8 | 0 | 0+3 | 0 | 0+1 | 0 | 13 | 0 | ||
| 13 | MF | Travis Dodd< | --A-League--> | 20+3 | 3 | 3 | 0 | 2 | 0 | 28 | 4 | ||
| 14 | DF | Aaron Goulding< | --A-League--> | 7+2 | 0 | 0+2 | 0 | 2 | 0 | 13 | 0 | ||
| 15 | FW | Michael Matricciani< | --A-League--> | 0+3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | ||
| 17 | DF | Adam van Dommele< | --A-League--> | 19 | 0 | 3 | 1 | 2 | 0 | 24 | 1 | ||
| 18 | DF | Robert Cornthwaite< | --A-League--> | 2+9 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | ||
| 20 | GK | Robert Bajic< | --A-League--> | 10+1 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | ||
| 21 | MF | Jason Spagnuolo< | --A-League--> | 0+1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | ||
| Players sold but featured this season | |||||||||||||
| 10 | MF | Aurelio Vidmar< | --A-League--> | 0 | 0 | 2 | 0 | 0 | 0 | 2 | 0 | ||
| 16 | MF | Tony Hatzis< | --A-League--> | 0+1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | ||
| 19 | FW |  Shengqing Qu< | --A-League--> | 17+2 | 7 | 1+2 | 0 | 2 | 0 | 24 | 7 | ||
| Rank | Position | Name | A-League | Pre-Season Challenge Cup | OFC Club Championship | Total | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | DF | Richie Alagich< | --A-League--> | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 |
| 2 | GK | Daniel Beltrame< | --A-League--> | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| 3 | MF | Ross Aloisi< | --A-League--> | 8 | 0 | 0 | 0 | 1 | 0 | 9 | 0 |
| 4 | DF | Adam van Dommele< | --A-League--> | 6 | 0 | 0 | 0 | 1 | 0 | 7 | 0 |
| FW | Carl Veart< | --A-League--> | 5 | 0 | 1 | 0 | 1 | 0 | 7 | 0 | |
| 6 | DF | Kristian Rees< | --A-League--> | 5 | 0 | 1 | 0 | 0 | 0 | 6 | 0 |
| 7 | DF | Angelo Costanzo< | --A-League--> | 3 | 0 | 0 | 0 | 2 | 0 | 5 | 0 |
| FW | Shengqing Qu< | --A-League--> | 5 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | |
| 9 | MF | Travis Dodd< | --A-League--> | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 0 |
| DF | Michael Valkanis< | --A-League--> | 3 | 0 | 1 | 0 | 0 | 0 | 4 | 0 | |
| 11 | DF | Matthew Kemp< | --A-League--> | 2 | 0 | 1 | 0 | 0 | 0 | 3 | 0 |
| 12 | MF | Lucas Pantelis< | --A-League--> | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 |
| 13 | MF | Louis Brain< | --A-League--> | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| FW | Fernando< | --A-League--> | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
| DF | Aaron Goulding< | --A-League--> | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
| FW | Michael Matricciani< | --A-League--> | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
See main article: article and 2005–06 A-League.
| Award | Player | |
|---|---|---|
| Club Champion | Carl Veart | |
| Player's Player | Michael Valkanis | |
| Top Goalscorer | Carl Veart | |
| Best Team Man | Matthew Kemp | |
| Rising Star | Adam van Dommele |