Australia at the 2004 Summer Olympics
Australia, the previous host of the 2000 Olympics at Sydney, competed at the 2004 Summer Olympics in Athens, Greece from 13 to 29 August 2004. Australian athletes have competed in every Summer Olympic Games of the modern era. The Australian Olympic Committee sent a total of 470 athletes to the Games to compete in 29 sports.
Australia finished the Athens Games having won a total of 50 medals, including 17 gold, the most gold medals to date although this was equalled in Tokyo 2020 and surpassed its total in Paris 2024 with 18 gold medals. Its strongest sports were swimming, cycling, diving, and rowing.
Archery
;Men;Women
Athletics
;Men;Track & road events
;Field events
;Women
;Track & road events
;Field events
;Combined events – Heptathlon
| Athlete | Event | 200 m | 800 m | Final | Rank | |||||
| Kylie Wheeler | Result | 13.88 | 1.79 | 13.18 | 24.35 | 6.36 | 37.77 | 2:17.65 | 6090 | 18 |
| Kylie Wheeler | Points | 995 | 966 | 739 | 947 | 962 | 625 | 856 | 6090 | 18 |
Badminton
Australia sent a team of eight badminton players to Athens. None of them surpassed the first round of elimination.;Men
;Women
;Mixed
Baseball
Australia advanced into the final game after defeating a Japanese team made up of professional players in Semifinal 1–0. Lost to Cuba in Final 2–6.;Team Roster
Manager: 24 - Jon Deeble.
Coaches: 2 - Tony Harris, 33 - Paul Elliott, 34 - Philip Dale.
;Preliminary Round
| Team | W | L | Tiebreaker |
| 6 | 1 | 1-0 | |
| 6 | 1 | 0-1 | |
| 5 | 2 | - | |
| 4 | 3 | - | |
| 3 | 4 | - | |
| 2 | 5 | - | |
| 1 | 6 | 1-0 | |
| 1 | 6 | 0-1 |
15 August
August 16
August 17
August 18
August 20
August 21
August 22
;Semifinals
24 August
;Gold Medal Final
25 August
; '''Won Silver Medal'''
Basketball
Australia has qualified both men's and women's teams.- Men's team event – 1 team of 12 players
- Women's team event – 1 team of 12 players
Men's tournament
;Roster;Group play
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;Classification round
Women's tournament
;Roster;Group play
;Quarterfinal
;Semifinal
;Gold Medal Final
; '''Won Silver Medal'''
Boxing
Australia has qualified nine boxers for the Olympics based on their performances from the Oceanian Qualification Tournament.Canoeing
Sprint
;Men;Women
Qualification Legend: Q = Qualify to final; q = Qualify to semifinal
Cycling
Road
;Men;Women
| Athlete | Event | Time | Rank |
| Sara Carrigan | Road race | 3:24:24 | |
| Olivia Gollan | Road race | 3:25:42 | 12 |
| Oenone Wood | Road race | 3:25:03 | 4 |
| Oenone Wood | Time trial | 32:16.00 | 6 |
Track
;Sprint;Pursuit
;Time trial
| Athlete | Event | Time | Rank |
| Shane Kelly | Men's time trial | 1:01.224 | 4 |
| Anna Meares | Women's time trial | 33.952 |
;Keirin
| Athlete | Event | 1st round | Repechage | 2nd round | Final |
| Athlete | Event | Rank | Rank | Rank | Rank |
| Ryan Bayley | Men's keirin | 1 Q | 1 Q | ||
| Shane Kelly | Men's keirin | 1 Q | 1 Q |
;Omnium
| Athlete | Event | Points | Laps | Rank |
| Mark Renshaw | Men's points race | 20 | 2 | 6 |
| Katherine Bates | Women's points race | 7 | 0 | 8 |
| Graeme Brown Stuart O'Grady | Men's madison | 22 | 0 |
Diving
;Men;Women
Equestrian
Eventing
"#" indicates that the score of this rider does not count in the team competition, since only the best three results of a team are counted.Fencing
;Men;Women
Field hockey
Australia qualified a men's and a women's team. Each team had 16 athletes with two reserves.Men's tournament
;Roster;Group play
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;Semifinals
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;Gold Medal Final
; Won Gold Medal
Women's tournament
;Roster;Group play
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;Fifth-Eighth Place Semifinal
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;Fifth Place Final
Football
Men's tournament
;Roster;Group play
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;Quarterfinal
Women's tournament
;Roster;Group play
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;Quarterfinal
Gymnastics
Artistic
Australia qualified a women's team and an individual man.;Men
;Women
;Team
;Individual finals
Judo
Australia has qualified a total of twelve judoka for the Games.;Men
;Women
Modern pentathlon
Based on the results from the 2003 Asian/Oceanian Championships, 1996 Olympic champion Alexander Parygin and Eszter Hortobagyi have qualified for modern pentathlon events in Athens. Parygin also previously competed for Kazakhstan.Rowing
;Men;Women
Qualification Legend: FA=Final A ; FB=Final B ; FC=Final C ; FD=Final D ; FE=Final E ; FF=Final F ; SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; R=Repechage
Sailing
;Men;Women
;Open
M = Medal race; OCS = On course side of the starting line; DSQ = Disqualified; DNF = Did not finish; DNS= Did not start; RDG = Redress given
Shooting
;Men;Women
Softball
;Team Roster;Preliminary Round
| Team | Pld | W | L | RF | RA | Pct |
 United States|2004 SummerSwimmingAustralian swimmers earned qualifying standards in the following events :;Men ;Women Table tennis;Men;Women TaekwondoAustralia has qualified four taekwondo practitioners in their respective divisions.Tennis;Men;Women VolleyballIndoorMen's tournamentAustralian men's team qualified after finishing second at the FIVB World Olympic Qualification Tournament in Tokyo.;Roster ;Group play Water poloMen's tournament;Roster;Group play ---- ---- ---- ---- ;7th-12th Classification Quarterfinal ---- ;7th-10th Classification Semifinal ---- ;9th-10th Classification Final Women's tournament;Roster;Group play ---- ---- ;Semifinal ;Bronze Medal Match Wrestling;Men's freestyle |