Perth Stadium, commercially known as Optus Stadium for sponsorship reasons, is a multi-purpose stadium in the Burswood suburb of Perth, Western Australia. It was completed during late 2017 and officially opened on 21 January 2018. The stadium's total capacity is 61,266, including standing room, making it the third-largest stadium in Australia (after the Melbourne Cricket Ground and Stadium Australia). The stadium can be extended up to 65,000 seats for rectangular sports.

Perth Stadium is primarily used for Australian rules football and cricket. Perth's two Australian Football League (AFL) teams – the Fremantle Football Club and the West Coast Eagles – relocated their home games from Subiaco Oval to Perth Stadium, while the Perth Scorchers play their Big Bash League home games at the venue, having previously played at the WACA Ground.

Perth Stadium was built by a consortium led by Multiplex. The announcement of the Burswood location in June 2011 followed a series of earlier proposals for the stadium, including locations in Subiaco and East Perth.

In 2003, the Government of Western Australia led by Alan Carpenter approved Terms of Reference for a review to examine the future of major sporting venues in Western Australia with Terms of Reference approved in December 2003. Having spent 2004 working with Football and Cricket bodies to try and advance the project the Government decided, in 2005, to appoint a taskforce. It was chaired by John Langoulant, Chief Executive of the Chamber of Commerce and Industry of Western Australia, and included private sector experts in finance, planning and architecture working with Department of Sport and Recreation infrastructure experts and the Department's Chief Executive Officer, Ron Alexander. The taskforce released its final report in May 2007. The report recommended the construction of a new 60,000-seat stadium at either Kitchener Park (which adjoins Subiaco Oval) or in East Perth, which would be suitable for Australian rules football, cricket and also rectangular-field sports such as soccer, rugby union and rugby league. The taskforce recommended against the further development of Subiaco Oval, which would be demolished. It also recommended against building the new stadium at the site of Burswood, stating that "The development costs at the Burswood site would be significantly higher due to local site conditions and the need for significant upgrades to transport infrastructure."

In July 2007, the Government of Western Australia announced its preference to build a new 60,000-seat stadium rather than re-develop Subiaco Oval, and in early 2008 it confirmed that Subiaco Oval would be demolished for the new Perth super-stadium to be built next door at Kitchener Park. This site was chosen ahead of the other suggested site at the old East Perth Power Station, which was set aside to house a new $500 million museum.

The new stadium at Subiaco was scheduled to be built between 2011 and 2016, with the majority of the stadium to be completed in 2014. Subiaco Oval was to be demolished between 2014 and 2016 to allow the end of construction on Perth Stadium. The staged construction would have allowed for Australian rules football to be played at the new venue by 2014, when the stadium was two-thirds completed with an initial capacity of 40,000 seats. The final stage would be completed in 2016 and expand the stadium's capacity to 60,000.

Stadium plans suggested its playing surface would have been oval in shape to accommodate Australian rules football and cricket games. The stadium was also expected to have retractable seating which would have reconfigured the venue to make it suitable for rectangular-field sports codes, such as soccer, rugby union and rugby league. These retractable seats were to number 22,000, and were to be situated along the touch lines and behind the posts in the rectangular configuration. With an overall planned capacity of 60,000, Perth Stadium would have been Western Australia's largest sports venue, and it was designed to be built such that the capacity could be increased to 70,000 if needed in the future.

The stadium was expected to be primarily used for Australian rules football with the ability to host cricket, rugby union, rugby league and soccer matches. It was planned that it would be the home ground for the West Coast Eagles and Fremantle Dockers, the two Western Australian teams in the Australian Football League. It was also planned to host rugby union Test matches, soccer and rock concerts. In reality AFL matches have been joined by the AFLW games and WAFL grand finals.