COVID-19 pandemic in Australia
The COVID-19 pandemic in Australia is part of the ongoing worldwide pandemic of the coronavirus disease 2019 () caused by severe acute respiratory syndrome coronavirus 2 (). The first confirmed case in Australia was identified on 25 January 2020, in Victoria, when a man who had returned from Wuhan, Hubei, China, tested positive for the virus.

Australian borders were closed to all non-residents on 20 March, and returning residents were required to spend two weeks in supervised quarantine hotels from 27 March. Many individual states and territories also closed their borders to varying degrees, with some remaining closed until late 2020, and continuing to periodically close during localised outbreaks. Social distancing rules were imposed on 21 March, and state governments started to close "non-essential" services. "Non-essential services" included social gathering venues such as pubs and clubs but unlike many other countries did not include most business operations such as construction, manufacturing and many retail categories. The number of new cases initially grew sharply, then levelled out at about 350 per day around 22 March, and started falling at the beginning of April to under 20 cases per day by the end of the month.

A second wave of infections emerged in Victoria during May and June 2020, which was attributed to an outbreak at a Melbourne quarantine hotel. The second wave, though largely localised to Melbourne, was much more widespread and deadlier than the first; at its peak, the state had over 7,000 active cases. Victoria underwent a second strict lockdown which eventually lasted almost four months. The wave ended with zero new cases being recorded on 26 October 2020.

, Australia has reported 30,643 cases, 25,486+ recoveries, and 910 deaths, with Victoria's second wave accounting for nearly 75 percent of cases and 90 percent of fatalities. No deaths from COVID-19 were recorded in Australia from 28 December 2020 until 13 April 2021, when one death occurred in Queensland. there has also been 2 deaths linked to an adverse vaccination reaction. On 15 April 2021, a 48-year-old New South Wales woman died in John Hunter Hospital after developing thrombosis (blood clot) with thrombocytopenia (abnormally low levels of platelets) four days after being vaccinated on 8 April 2021 with the Oxford–AstraZeneca vaccine. The second TTS death, a 52-year-old woman also from NSW, had a blood clot in her brain, a cerebral venous sinus thrombosis before she died. By 10 June there had been 48 cases in Australia of thrombosis with thrombocytopenia syndrome (TTS) in people after they received Oxford–AstraZeneca vaccinations. Long-haul flying is still a greater risk for deep vein thrombosis (DVT) than COVID-19 vaccinations.

The stated goal of the National Cabinet is "suppression", as opposed to "elimination", meaning continually trying to drive community transmission to zero but expecting that new outbreaks may occur. This is in contrast to the mitigation strategies implemented by most other nations. Compared to other Western countries, notably the United States and European countries, Australia's handling has been praised for its effectiveness. Distinctive aspects of that response included early interventions to reduce reflected transmission from countries other than China during late January and February 2020; rapid recruitment of a large contact tracing workforce during March 2020; comparatively high public trust in government responses to the pandemic, at least compared to the US and later on, the use of short intense lockdowns to facilitate exhaustive contact tracing of new outbreaks. Although Australia's efforts to develop a bluetooth-based contact tracing app were not particularly effective, QR code based contact tracing apps became ubiquitous in Australia's businesses. These apps, which are effectively required by State Governments, give government health departments the ability to reconstruct the presence of anyone visiting bars or restaurants, generally for 28 days after the visit.

The nationwide vaccination program began with the first doses of the Pfizer COVID-19 vaccine being administered in Sydney on Sunday 21 February 2021.
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