Like every other country, there are specific sports that are much more popular than others, and Australia is the exact same. Aussie Rules Football is probably the most popular spectator sport in Australia, as well as the Australian Football League. Although these sports have a limited following around the world, they are very popular in Australia and there is a huge market for them in regards to online betting sites.
Other popular sports to bet on include Football (soccer), with the A-League, national team and other football from around the world. Similar to America, football has grown tremendously in the past two decades in Australia and will continue to grow. Also, Cricket is very popular in Australia, especially around the time of the Ashes against England and Tennis takes up a large amount of betting action during the Australian Open in Melbourne. There is definitely a wide variety of popular sports to bet on in Australia, amongst others from around the world.