East Timor (Timor-Leste) competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August.

Two track and field athletes, Gil da Cruz Trindade and Agueda Amaral, were selected to represent the nation via wildcards, as the nation had no athletes that met either the "A" or "B" qualifying standards in their respective events, the Men's and Women's marathons.

At 32 years and 88 days, Amaral became the oldest athlete to represent the nation at the Summer Games, which still stands today.

Ultimately, neither athlete won a medal in their events, with Trindade not even finishing his marathon.

[1] The National Olympic Committee of East Timor (NOC) selected two athletes via wildcards.