Tunisia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eleventh appearance at the Olympics, except the 1980 Summer Olympics in Moscow because of its partial support to the United States boycott.

The Tunisian Olympic Committee (French: Comité National Olympique Tunisien, CNOT) sent the nation's largest delegation to the Games, surpassing the record by three athletes short in Atlanta eight years earlier. A total of 54 athletes, 44 men and 10 women, competed only in 14 sports. men's football, and men's indoor volleyball were the only team-based sports in which Tunisia had its representation at these Olympic Games. Among the sports played by the athletes, Tunisia marked its Olympic debut in artistic gymnastics and taekwondo. Five Tunisian athletes had previously competed in Sydney, including race walker Hatem Ghoula, and swimmer Oussama Mellouli, who won the bronze at the 2003 FINA World Championships in Barcelona, Spain. Meanwhile, volleyball team captain Noureddine Hfaiedh was the nation's flag bearer in the opening ceremony.

Tunisia left Athens without a single Olympic medal, since long distance runner Mohammed Gammoudi claimed the Olympic title in the men's 5000 metres at the 1968 Summer Olympics in Mexico City. Before becoming the first Olympian to take both the pool and open water titles in the history, Mellouli started to flourish his swimming career with a brilliant fifth-place finish in the men's 400 m individual medley.

...
Wikipedia