Perth is very conducive to an outdoors lifestyle, and this is reflected in the wide variety of sports available to citizens of the city. Perth was host to the 1962 Commonwealth Games and also the 1987 America’s Cup defence (based at Fremantle).
Australian Rules Football is a popular spectator sport in Perth, with over 1,030,000 attending WAFL and AFL matches, more than any other sport in the state. 
Interestingly, Perth has the strongest regional (State/County/Province) field hockey competition in the World. There are many field hockey clubs for children, men, women and veterans (over 40 year of age). Western Australia (especially given it only has 10% of Australia’s population) hugely contributes to the national Australian men’s and ladies’ hockey teams which have both been winners of Olympic Gold Medals.
Perth is home to several teams which are part of national sporting competitions:
Two teams in the Australian Football League (AFL): the West Coast Eagles and the Fremantle Football Club (the “Fremantle Dockers”). The “home” of Australian Rules football in Perth is Subiaco Oval.
A state cricket team, known as the Western Warriors.
A football (soccer) team, Perth Glory, which is a part of the newly re-formed soccer competition known as the A-League. In the past Perth Glory have been a relatively successful team by winning the last two NSL (National Soccer League) seasons (2002-03 & 2003-04).
A team in the National Basketball League, the Perth Wildcats, who are one of the most successful teams in the league’s history. However, the popularity of basketball as a spectator sport in Australia has sharply declined since the early 1990s.
A rugby union team, the Western Force, in the Super 14 competition. Perth also hosts the “Perth Gold” team in the Australian Rugby Shield competition. Rugby league briefly maintained a Perth team in the national competition (1995-1997), known as the Western Reds (Perth Reds in the Super League season)
In 2002, Perth hosted the World Lacrosse Games, which included the World Lacrosse Championships (won by the United States), the Australian Youth Lacrosse Championship, a Masters (35+ year old), Grandmasters (45+), and International Open Championships.
The 1991 and 1998 FINA World Championships were held in Perth.
Every year Perth hosts the Hopman Cup, an international tennis tournament, generally in the first week of January. This is held at the Burswood Dome, and presents Perth on an international stage.
Perth is also home to the annual Avon Descent whitewater event, and the annual Rally Australia.
Every summer the Australian cricket team plays a test match and one one day international matches at the WACA ground. Of the two touring teams for the one day internationals one will play two games the other will play once.