Nine-a-side footy is a sport based on Australian rules football played informally by Aussie Rules clubs but not yet an official sport in its own right.

9-a-side games are sometimes played on half size fields that are typically rectangular or more commonly rugby fields, with 9 players on the field at any one time, typically consisting of 3 forwards, 3 backs and 3 centre players. Often two games are played at the same time on a single Australian Rules or cricket pitch. Other times, 9-a-side makes use of the full space of the field when a full complement of players is not available. This variety is a more open, running variety of Australian rules.

The following rules apply in 9-a-side footy as played by Aussie Rules UK:

All other rules remain unchanged.

Australians Rules football has struggled to develop outside of Australia partly because the game is highly resource intensive. A game requires the use of a large cricket oval, many players (40 including interchanges) and several officials. The adaptation of the game to rugby fields requires far fewer players and a pitch that is more readily available, and as a result, many more people are being introduced to the game outside of Australia.