2 January - "Crocodile Hunter" Steve Irwin feeds a crocodile at his theme park, Australia Zoo, while holding his one-month-old baby son, Bob Irwin. The incident generates a great deal of criticism both nationally and internationally over the next few days.
8 January - 33 asylum seekers detained on Nauru decide to suspend their month-long hunger strike after hearing of plans for an Australian medical team to travel to the island.
Prime Minister John Howard discusses the issues of security and missile defence with the United States Chairman of Joint Chief of Staff, General Richard Myers.
Queensland Premier Peter Beattie announces an election date of February 7.
19 January - Cricketer David Hookes died after a fight outside a Melbourne pub.
23 January - The Queensland Crime and Misconduct Commission has found no evidence of any misconduct by the state's police or judiciary, or by politicians including Premier Peter Beattie and Federal MP Tony Abbott, in relation to the jailing last year of Pauline Hanson and David Ettridge.
3 March - A bottle of wine is discovered on board the Queensland Government jet when Indigenous Policy Minister Liddy Clark and her staff visit an alcohol free Indigenous community at Lockhart River, about 800km north of Cairns, Queensland.
11 March – A Senate report on poverty is immediately dismissed by Prime Minister John Howard. The report shows between 2 and 3.5 million Australians, or up to 19 per cent of the population, are living in poverty.
20 March - Van Tuong Nguyen is sentenced to death in the Singaporean High Court after being convicted of trafficking 396.2g of heroin into Singapore in December 2002.
27 March - Brisbane City Council Elections. Liberal candidate Campbell Newman becomes Lord Mayor of Brisbane defeating Labor candidate Tim Quinn, thus ending 13 years of Labor government in Brisbane.
5 April – Australia's biggest supplier of the potential explosiveammonium nitrate decides to pull the product from its stores in response to concerns it could be used by terrorists.
14 April – The Family Court allows a thirteen-year-old child, born female, to start preliminary hormone treatment: the child identifies as being male and has been suffering from gender identity disorder.
24 April – John Howard joins Australian troops in Baghdad for ceremonies honouring the country's war dead.
Defence Minister Robert Hill admits that his office knew of allegations of abuse of Iraqi prisoners.
2 June - Former Qantas baggage handler, 34-year-old Bilal Khazal, is arrested outside his home at Laremba, in Sydney's south-west, charged with collecting or making documents likely to facilitate terrorist acts. It's the first time someone has been charged with this offence since the laws were passed in 2002.
3 June – United States PresidentGeorge W. Bush publicly supports Prime Minister John Howard and criticises Opposition Leader Mark Latham, sparking criticism from the Opposition for intervening in Australian domestic politics.
8 June - A post mortem examination report is released which reveals that euthanasia crusader, Nancy Crick, had no cancer in her body at the time she took her life on 21 May 2002.
15 June - Prime Minister John Howard releases the Government's Energy Statement which introduced the term "Mandatory Renewable Energy Target", benchmarks set by the government for the amount of non-polluting energy that Australia uses. Australia's current target is two percent renewable energy.
16 June - Defence Minister Robert Hill releases his long awaited statement to the Senate explaining how it was that he and Prime Minister, John Howard, misled Parliament over Defence knowledge of Iraqi prisoner abuse at Abu Ghraib prison.
24 June - Federal Sports Minister Rod Kemp releases details of an inquiry into sports doping. Retired Justice Robert Anderson has one week to question the five implicated cyclists, and use scientific testing to show Cycling Australia and the Australian Olympic Committee that the athletes have no case to answer.
25 June -
The New South Wales Government rushes new water laws through Parliament.
Federal Opposition Leader Mark Latham calls an extraordinary media conference to deal with the circulating rumours about him.
30 July - Australian cyclist, Jobie Dajka, is dropped from the Australian Athens Olympic team after he admitted to lying to the Robert Anderson doping inquiry. His DNA has been found on syringes and vials in the room of disgraced cyclist Mark French at the Australian Institute of Sport in Adelaide.
3 August - President George W. Bush signs the United States-Australia Free Trade Agreement Implementation Act into law.
6 August -
In a 4-3 ruling, the High Court finds that the existing immigration laws are valid and that failed asylum seekers who cannot be deported can be held in detention indefinitely.
The leader of the extreme right-wing Australian Nationalists Movement in Western Australia, Jack van Tongeren, is taken into custody by police. Police were seeking the self-proclaimed white supremacist to question him about racist graffiti attacks in Perth.
Gavin Hopper, former tennis coach of Mark Philippoussis, is sentenced in Melbourne over the indecent assault of one of his 14-year-old pupils at Wesley College.
13 August - The Australia-United States Free Trade Agreement Implementation Act is passed by the Senate, with amendments. The Labor Party had insisted on amendments designed to protect cheap generic medicine manufacturers.
16 August - Michael Scrafton, a former senior adviser to Peter Reith, reveals that he told John Howard on 7 November 2001 that the Children Overboard claim might be untrue. Mr Howard said they only discussed the inconclusive nature of the video footage. In light of the new information, the Labor opposition called for a further inquiry, which was convened on 1 September.
17 August - Federal Opposition Leader Mark Latham is hospitalised after being diagnosed with pancreatitis.
20 August -
United States Ambassador to Australia, Tom Schieffer, makes it clear he expects Australia would help the United States defend Taiwan if China invaded Taiwan.
Senator George Brandis presents telephone records to the Senate Inquiry into the "Children Overboard" affair in a bid to discredit claims by former government adviser, Michael Scrafton, that he told Prime Minister, John Howard, that there was no evidence to support claims made about asylum seekers throwing their children into the sea.
Prime Minister John Howard denies having lied to the Australian public about "children overboard".
Australian Olympic athletes returned from the Athens Olympic Games.
8 September - British Airways announces that it is selling its $1.1 billion stake in Qantas in order to cut debt and fund possible acquisitions. The sale ends an 11-year relationship between the two airlines.
9 September – A bomb blast outside the Australian embassy in Jakarta, Indonesia, kills eleven people and injures up to 100 people.
17 September - Federal Treasurer Peter Costello unveils the updated estimate of the national GST revenue. Prime Minister John Howard says the States will receive $3 billion more revenue than expected as a result.
29 September - Mark Latham officially launches the Labor Party's election campaign.
30 September - The President of Nauru, Ludwig Scotty, declared a state of emergency, dissolved Parliament and set an election date of 23 October.
15 November - The Cairns Tilt Train derailment occurred at 11.55pm when the City of Townsville diesel tilt train derailed north of Berajondo, approximately 342 km (213mi) north-west of Brisbane, Queensland.
26 November – A riot occurs on Palm Island leading to a complete break down of law and order with the 18 members of the Queensland Police barricading themselves in the local hospital.
11 December – The Network Ten is the next Australian television network to introduce a watermark on its programs, although the watermark was broadcast on Ten News. It was located on the bottom left of the screens by TEN-10 Sydney before switching to bottom right in 2006.
12 September – Daniel Green wins the men's national marathon title, clocking 2:23:06 in Sydney, while Jenny Wickman claims the women's title in 2:55:09.
25 September – The Port Adelaide Power (17.11.113) defeat the Brisbane Lions (13 October 1973) to win the 108th VFL/AFL premiership. It is the first AFL premiership for Port Adelaide & the first grand final loss for Brisbane.
3 October – The Canterbury Bulldogs defeat the Sydney Roosters 16-13 to win the 97th NSWRL/ARL/NRL premiership. It marks a successful end to a controversial season for the Bulldogs, in which they were accused of sexual assault while in Coffs Harbour. The behaviour from some of their fans at times also put the club in hot water.