2–6 February - Cyclone Beni causes widespread flooding and damage in south-east Queensland, but also easing the drought in rural areas. Floodwaters tragically claimed the life of a 67-year-old man in Rockhampton on 5 February.
4 February - Mike Horan was voted out by the National Party as Leader of the Opposition in Queensland and was replaced by Lawrence Springborg.
11 February - Justice John Dyson Heydon was sworn in as judge of the High Court of Australia, replacing Justice Mary Gaudron.
16 February – Tens of thousands of Australian protestors join millions more in other cities around the world in protesting the Iraq War. These are the biggest street protests seen since the Vietnam War.
22 February - Cricketer Shane Warne is suspended from cricket for one year from 10 February 2003.
26 February - Victorian MP and former Olympic skier, Kirstie Marshall, is ejected from her first question time when she breastfed her newborn baby in Victoria's Parliament, the first woman to do so.
14 May - Shirley and Vijay Singh ask police to remove Max Sica from their children's funeral service.
25 May - Peter Hollingworth bows to pressure and quits as Governor-General following Anglican church child sex scandal.
29 May – An attempted hijacking of Qantas Flight 1737 between Melbourne and Launceston is thwarted when a flight attendant and passengers subdue and disarm the culprit.
Stockbroker Rene Rivkin is fined $30,000 and sentenced to nine months of periodic detention for insider trading. A jury found that he had acted improperly in buying 50,000 Qantas shares in April 2001 just hours after hearing of a potential merger between the company and the struggling Impulse Airlines.
3 July - Australian film critic, Margaret Pomeranz, attempted in Sydney to screen the controversial movie Ken Park, which had been refused classification and banned by the Classification Review Board on the grounds that the film depicted actual child sex abuse.
10 July - News South Wales' Independent Commission Against Corruption issued findings against a member of the Legislative Council, Malcolm Jones, of the Outdoor Recreation Party. The ICAC found Mr Jones had misused taxpayer dollars, by falsely claiming an allowance for living in the country, as well as using entitlements to prop up other political parties.
11 July - Pop singer Delta Goodrem announces that she has been diagnosed with Hodgkin's disease, a rare form of cancer.
19 July - The Australian Government committed 2,500 troops to the Solomon Islands for a Regional Assistance Mission in an effort to help the government re-establish law and order. The troops arrived on 24 July.
1 September - Former One Nation leader, Pauline Hanson, and David Ettridge were refused bail.
3 September - Radical cleric Abu Bakar Bashir sentenced to four years's jail after being found guilty of participating in a campaign of treason against Indonesia. He was also convicted for his involvement in the 2002 Bali bombings.
10 September - Imam Samudra is found guilty for his involvement in the 2002 Bali bombings.
25 September - Gina Rinehart, daughter of mining magnate Lang Hancock, and Rose Hancock, his widow, decided to end their long-running legal battle.
29 September - Prime Minister John Howard announces a major ministerial reshuffle. Philip Ruddock becomes Attorney-General, Amanda Vanstone became Immigration Minister and Tony Abbott became Health Minister.
3 October - Pop starlet and Neighbours actress Holly Valance lost in the NSW Supreme Court legal battle with her former manager, Scott Michaelson, who had sued Valance for dumping him as manager last year. Mr. Justice Clifford Einstein awarded more than $330,000 plus legal costs to Michaelson on 6 October.
14 October - Three gunmen, one using an automatic weapon, fired indiscriminately into 5 Lawford Street, Greenacre, Sydney, killing 22-year-old Mervat Hanka, asleep in her bed, and 24-year-old Ziad Abdulrazak, who'd been to jail for drug offences.
24 October - Agriculture Minister, Warren Truss, announced that the 50,000 sheep from the Cormo Express, stranded in the Persian Gulf 79 days after leaving Australia, have been accepted by the Government of Eritrea.
26 October - ASIO raids the Sydney homes of six suspected terror suspects, including that of 35-year-old Frenchman Willie Brigitte.
30 October - Ahmad Fahda, 25, was executed in a hail of gunfire in front of horrified onlookers at the service station on the corner of Punchbowl Road and Dudley Street, Punchbowl, Sydney, New South Wales.
The Federal Government's Telstra privatisation bill failed to pass the Senate.
6 November - The Queensland Court of Appeal set aside the convictions of Pauline Hanson and David Ettridge.
11 November - Turkish Kurd asylum seekers who landed on Melville Island last week are sent to Indonesia amid a cloud of political controversy.
14 November - The Queensland Crime and Misconduct Committee resolved that it would investigate the imprisonment of Pauline Hanson and David Ettridge.
20 November - A shipment of 70,000 sheep bound for the Middle East was delayed when Victorian authorities found shredded ham placed into the sheep's feed. Activists declared they'd put pig meat into the feed in an attempt to stop the live sheep from meeting the criteria for Muslim markets.
3 December - Former Queensland Chief Magistrate Di Fingleton walks free from jail after six months.
8 December - The Federal Government announces a budget surplus.
16 December - The Federal Government made its long-awaited announcement on the excise rate for fuel alternatives after their final Cabinet meeting for the year. LPG for cars, previously free of excise, will be taxed by 2.5 cents per litre from mid-2008.
17 December - Health Minister, Tony Abbott, unveils the Government's medical indemnity insurance package.
18 December - The Productivity Commission's draft report on housing affordability for first homebuyers is released and puts forward measures including the scrapping of stamp duties, as well as the means testing of the $7,000 First Home Owners Grant. The Productivity Commission concedes there's no quick fix for the big jump in house prices over the last few years.
11 February - Australian cricketer Shane Warne tested positive to a banned substance and the Australian Cricket Board announced that it had referred the matter to the Anti-Doping Policy Committee. Warne announced that he was standing down from Australia's World Cup campaign.
3 April – First day of the Australian Track & Field Championships for the 2002–2003 season, which are held at the ANZ Stadium in Brisbane, Queensland. The 5,000 metres were conducted at the Melbourne Track Classic, Victoria on Saturday 1 March 2003. The 10,000 metres (men and women) were conducted at the Runaway Bay Grand Prix in Queensland on Saturday 12 April 2003.
6 April – Sydney Kings win their first championship by defeating Perth Wildcats 117-101 in Game 2 of the last best-of-three NBL Grand Final series.
7 April – The Crawford Report delivers recommendations to the Federal Government regarding the Structure, Governance and Management of Soccer in Australia.
10 August: On a rainswept Arena Joondalup, East Perth score only 0.9 (9) against deadly rivals West Perth, the first goalless score in WAFL/WANFL/Westar Rules football since West Perth themselves kicked 0.10 (10) against soon-to-be-defunct Midland Junction in May 1916.