The 2025 Australian Championship was the first edition of the Australian Championship, a national second-tier competition of soccer in Australia, held after the finish of the second-tier 2025 National Premier Leagues season. The tournament consisted of six home-and-away matches in four groups for teams in the group stage, culminating in a knockout finals series, running from 10 October and concluding on 6 December.
South Melbourne became the inaugural champions after defeating Marconi Stallions in the final.
Sixteen clubs participated in the inaugural edition. Eight clubs gained automatic qualification as the competition's "foundation clubs": Avondale FC, Marconi Stallions, Preston Lions, South Melbourne, Sydney Olympic, Sydney United 58, Wests APIA, and Wollongong Wolves.
The other eight qualified via the 2025 National Premier Leagues, seven as premiers: Bayswater City (WA), Broadmeadow Magic (Northern NSW), Canberra Croatia (ACT), Moreton City Excelsior (Queensland), North Eastern MetroStars (SA), NWS Spirit (NSW), and South Hobart (Tasmania). The 2025 NPL Victoria premiers, Avondale FC, had already qualified as a foundation club, so their berth went to the league's second-placed team Heidelberg United.
The draw for the group stage was conducted on 1 May. Four of the foundation clubs (APIA Leichhardt, Avondale, Marconi Stallions and South Melbourne) were seeded into Position 1 of each group.
The group stage was played from 10 October to 16 November.
All times listed are local time.
<section begin="2025 Australian Championship Group A" /><section end="2025 Australian Championship Group A"/>
<section begin="2025 Australian Championship Group B" /><section end="2025 Australian Championship Group B" />
<section begin="2025 Australian Championship Group C" /><section end="2025 Australian Championship Group C" />
<section begin="2025 Australian Championship Group D" /><section end="2025 Australian Championship Group D" />
The quarter-finals were played between 21 and 23 November at the home grounds of the group winners; Football Australia selected the venues for the semi-finals and the final, citing the desire to "maximise national reach and deliver the best possible experience for players, fans and broadcast audiences".
<section begin="2025 Australian Championship finals" /><section end="2025 Australian Championship finals" />