Dominica was represented at the 2004 Summer Olympics in Athens, Greece by the Dominica Olympic Committee.
In total, two athletes including one man and one woman represented Dominica in one sport: athletics.
Background
The 2004 Summer Olympics in Athens, Greece marked Dominica's third appearance at the Olympics after the country made its Olympic debut at the 1996 Summer Olympics in Atlanta, Georgia, United States. They had not previously won a medal. The delegation at the 2004 games would be their smallest so far after six athletes competed in 1996 and four contested the 2000 Summer Olympics in Sydney, New South Wales, Australia.
Competitors
In total, two athletes represented Dominica at the 2004 Summer Olympics in Athens, Greece in one sport.
{| class="wikitable sortable" style="text-align:center;"
! width=180|Sport
! width=55|Men
! width=55|Women
! width=55|Total
|-
| align=left|Athletics
| 1 || 1 || 2
|- class="sortbottom"
! Total || 1 || 1 || 2
|}
Athletics
In total, two Dominican athletes participated in the athletics events – Marie-Lyne Joseph in the women's 800 m and Chris Lloyd in the men's 400 m.
The heats for the men's 400 m took place on 20 August 2004. Lloyd finished sixth in his heat in a time of 47.98 seconds and he did not advance to the semi-finals.
{|class=wikitable style="font-size:90%"
|-
!rowspan="2"|Athlete
!rowspan="2"|Event
!colspan="2"|Heat
!colspan="2"|Semifinal
!colspan="2"|Final
|- style="font-size:95%"
!Result
!Rank
!Result
!Rank
!Result
!Rank
|-align=center
|align=left|Chris Lloyd
|align=left|400 m
|47.98
|6
|colspan=4|did not advance
|}
The heats for the women's 800 m took place on 20 August 2004. Joseph finished seventh in her heat in a time of two minutes 20.23 seconds and she did not advance to the semi-finals.
{|class=wikitable style="font-size:90%"
|-
!rowspan="2"|Athlete
!rowspan="2"|Event
!colspan="2"|Heat
!colspan="2"|Semifinal
!colspan="2"|Final
|- style="font-size:95%"
!Result
!Rank
!Result
!Rank
!Result
!Rank
|-align=center
|align=left|Marie-Lyne Joseph
|align=left|800 m
|2:20.23
|7
|colspan=4|did not advance
|}
Aftermath
Dominica had established itself as a regular competitor at the Summer Olympics. They have entered every edition since 1996. They made their Winter Olympic debut at the 2014 Winter Olympics in Sochi, Russia and won their first medal of any colour by taking gold in the women's triple jump at the 2024 Summer Olympics in Paris, France.