2005 World Championships in Athletics – Women's 4 × 400 metres relay

The 4 × 400 metre relay at the 2005 World Championships in Athletics was held at the Helsinki Olympic Stadium on August 13 and August 14.

Qualifying
From the initial two heats the first three teams in each plus two fastest losers progressed through to the final.

All times shown are in seconds.
 * Q denotes automatic qualification.
 * q denotes fastest losers.
 * DNS denotes did not start.
 * DNF denotes did not finish.
 * AR denotes area record.
 * NR denotes national record.
 * PB denotes personal best.
 * SB denotes season's best.

Heat 1

 * 1) [[Image:Flag of Russia.svg|20px]] Russia (Olesya Krasnomovets, Natalya Antyukh, Tatyana Firova, Olesya Zykina) 3:20.32 Q (WL)
 * 2) [[Image:Flag of Poland.svg|20px]] Poland (Anna Guzowska, Monika Bejnar, Grażyna Prokopek, Zuzanna Radecka) 3:26.04 Q
 * 3) [[Image:Flag of Belarus.svg|20px]] Belarus (Natalya Sologub, Yulyana Zhalniaruk, Anna Kozak, Ilona Usovich) 3:27.65 Q (SB)
 * 4) [[Image:Flag of Germany.svg|20px]] Germany (Claudia Marx, Claudia Hoffman, Corinna Fink, Ulrike Urbansky) 3:27.96 q
 * 5) [[Image:Flag of Senegal.svg|20px]] Senegal (Aïda Diop, Fatou Bintou Fall, Aminata Diouf, Amy Mbacké Thiam) 3:29.03 (SB)
 * 6) [[Image:Flag of Romania.svg|20px]] Romania (Angela Moroșanu, Mihaela Stancescu-Neacsu, Alina Râpanu, Maria Rus) 3:30.97
 * 7) [[Image:Flag of Bulgaria.svg|20px]] Bulgaria (Monika Gachevska, Mariyana Dimitrova, Nedyalka Nedkova, Monika Ivanova) 3:38.96

Heat 2

 * 1) [[Image:Flag of the United Kingdom.svg|20px]] Great Britain (Lee McConnell, Donna Fraser, Nicola Sanders, Christine Ohuruogu) 3:26.19 Q (SB)
 * 2) [[Image:Flag of Brazil.svg|20px]] Brazil (Maria Laura Almirão, Geisa Aparecida Coutinho, Josiane Tito, Lucimar Teodoro) 3:26.82 Q (AR)
 * 3) [[Image:Flag of Ukraine.svg|20px]] Ukraine (Antonina Yefremova, Oksana Ilyushkina, Liliya Pilyuhina, Natalya Pygyda) 3:27.23 Q
 * 4) [[Image:Flag of Jamaica.svg|20px]] Jamaica (Shericka Williams, Novlene Williams, Ronetta Smith, Lorraine Fenton) 3:27.87 q (SB)
 * 5) [[Image:Flag of Mexico.svg|20px]] Mexico (Ruth Grajeda, Gabriela Medina, Mayra González, Magali Yañez) 3:31.41 (SB)
 * 6) [[Image:Flag of South Africa.svg|20px]] South Africa (Amanda Kotze, Dominique Koster, Surita Febbraio, Estie Wittstock) 3:31.71 (SB)
 * [[Image:Flag of the United States.svg|20px]] United States (Suziann Reid, Monique Hennagan, Moushaumi Robinson, Monique Henderson) DSQ

Final

 * 1) [[Image:Flag of Russia.svg|20px]] Russia (Yuliya Pechonkina, Olesya Krasnomovets, Natalya Antyukh, Svetlana Pospelova) 3:20.95
 * 2) [[Image:Flag of Jamaica.svg|20px]] Jamaica (Shericka Williams, Novlene Williams, Ronetta Smith, Lorraine Fenton) 3:23.29 (SB)
 * 3) [[Image:Flag of the United Kingdom.svg|20px]] Great Britain (Lee McConnell, Donna Fraser, Nicola Sanders, Christine Ohuruogu) 3:24.44 (SB)
 * 4) [[Image:Flag of Poland.svg|20px]] Poland (Anna Guzowska, Monika Bejnar, Grażyna Prokopek, Anna Jesień) 3:24.49 (NR)
 * 5) [[Image:Flag of Ukraine.svg|20px]] Ukraine (Antonina Yefremova, Oksana Ilyushkina, Liliya Pilyuhina, Natalya Pygyda) 3:28.00
 * 6) [[Image:Flag of Germany.svg|20px]] Germany (Claudia Marx, Claudia Hoffman, Corinna Fink, Ulrike Urbansky) 3:28.39
 * [[Image:Flag of Brazil.svg|20px]] Brazil (Maria Laura Almirão, Geisa Aparecida Coutinho, Josiane Tito, Lucimar Teodoro) DSQ
 * [[Image:Flag of Belarus.svg|20px]] Belarus (Alena Nevmerzhitskaya, Natalya Sologub, Anna Kozak, Ilona Usovich) DSQ