| Serena Williams|
| Kim Clijsters|
Serena Williams was the defending champion but did not compete that year.
Kim Clijsters won in the final 6–2, 6–1 against Mary Pierce.
2004 Open Gaz de France – Singles Wikipedia
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top four seeds received a bye to the second round.