2005 AFL Under 18 Championships
The 2005 NAB AFL Under-18 Championships was the 10th edition of the AFL Under 18 Championships. Eight teams competed in the championships: Vic Metro, Vic Country, South Australia and Western Australia in Division 1, and New South Wales/Australian Capital Territory, Northern Territory, Queensland and Tasmania in Division 2. The competition was played over three rounds across two divisions. Vic Metro and Tasmania were the Division 1 and Division 2 champions, respectively. The Larke Medal was awarded to Victoria Metro's Marc Murphy, and the Hunter Harrison Medal was won by Tasmania's Grant Birchall.
Results
Division 1
Division 1 Ladder| TEAM | WON | LOST | FOR | AGAINST | PERCENTAGE |
| Vic Metro | 3 | 0 | 261 | 173 | 150.9% |
| Western Australia | 2 | 1 | 224 | 163 | 137.4% |
| South Australia | 1 | 2 | 186 | 205 | 90.7% |
| Vic Country | 0 | 3 | 134 | 264 | 50.8% |
Division 2
Division 2 Ladder| TEAM | WON | LOST | FOR | AGAINST | PERCENTAGE |
| Tasmania | 3 | 0 | 282 | 198 | 142.4% |
| Queensland | 2 | 1 | 241 | 185 | 130.3% |
| NSW/ACT | 1 | 2 | 213 | 177 | 120.3% |
| Northern Territory | 0 | 3 | 134 | 304 | 44.1% |
Under-18 All-Australian team
The 2005 Under-18 All-Australian team was named on 4 July 2005:For the first time, the Under-18 All-Australian side was named in position to give balance and recognition to players that played terrific roles in defence, as well as players who were creative up forward, so it was not just a midfielders' side. It recognised players across the ground for their performance they put in throughout the Under 18 Championships.
The 2005 Under-18 All-Australian team selectors were: Kevin Sheehan, Alan McConnell, James Fantasia, Kinnear Beatson, Neville Stibbard, Francis Jackson