The women's 400 metres at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 21 to 24. The winning margin was 0.14 seconds.
Jeremy Matthew Wariner is a retired American track athlete specializing in the 400 meters. He has won four Olympic medals and six World Championships medals. He is the sixth fastest competitor in the history of the 400 m event with a personal best of 43.45 seconds, behind Wayde van Niekerk, Michael Johnson and Butch Reynolds and the fifth fastest all-time mark when he set it in 2007.
Muriel Hurtis-Houairi is a French track and field athlete. She came to prominence in 2002 when she won the 200 m gold medals at both the European Indoor Championships and the European Athletics Championships. The following year she added the World Indoor title and won a bronze medal at the 2003 World Championships in Athletics and a gold in the 4×100 metres relay with France.
Alleyne Jeremy Francique is a retired Grenadian athlete who specialized in 400 metres, his personal best being 44.47 seconds set in 2004. He is the 400m two-time world indoor champion in 2004 and 2006.
Natalya Nikolayevna Antyukh is a Russian sprinter who specializes in the 400 metres and 400 metres hurdles. She won the bronze medal in the 400 metres and a silver for the 4 × 400 m relay at the 2004 Summer Olympics in Athens.
LaShawn Merritt is a retired American track and field athlete who competed in sprinting events, specializing in the 400 metres. He is a former Olympic champion over the distance and his personal best of 43.65 seconds makes him the eleventh fastest of all time.
Zuzana Hejnová is a retired Czech athlete who specialised in the 400 metres hurdles. She won the silver medal in the event at the 2012 London Olympics. Hejnová is a two-time World Champion, having claimed titles at the 2013 and 2015 World Championships in Athletics. She won bronze at the 2012 European Championships and silver for the 400 metres at the 2017 European Indoor Championships.
Natasha Monique Hastings is an American 400 meter track and field sprinter.
Brenda Taylor is an American track and field athlete who specialises in the 400 meter hurdles. She reached the final of the event at the 2004 Summer Olympics. She also competed at the 2001 World Championships in Athletics and won a medal at the 2003 IAAF World Indoor Championships in the 4×400-meter relay.
Muizat Ajoke Odumosu Alademerin is a Nigerian track and field athlete who specialises in the 400 metres and the 400 metres hurdles. She represented Nigeria at the 2008 and 2012 Summer Olympics and competed at the World Championships in Athletics in 2007, 2009, 2011 and 2013. She was the bronze medallist at the 2007 All-Africa Games and went on to become the continental champion with a win at the 2008 and 2012 African Championships.
Shaunae Miller-Uibo is a Bahamian track and field sprinter who competes in the 200 and 400 metres. She is a two-time Olympic champion after winning the women's 400 metres at the 2016 Rio Olympics and again at the 2020 Tokyo Olympics.
Stephenie Ann McPherson is a Jamaican track and field athlete, who specializes in the 400 metres. She has won a bronze medal in the event at the 2013 World Championships, and then placed in the finals of both the 2016 Rio Olympics and the 2020 Tokyo Olympics and all four following World Championships between 2015 and 2022, consecutively. McPherson earned also a bronze at the 2022 World Indoor Championships. She added medals in the 4 x 400 metres relays, taking a silver at the 2016 Olympics, a gold in 2015 in Beijing, and a bronze in 2019.
Suziann Reid is an American-Jamaican former track and field sprinter who specialized in the 400-meter dash. She set a personal record of 50.74 seconds for the distance in 1999. She was a silver medalist with the American women's 4 × 400-meter relay team at the 1999 World Championships in Athletics. She was part of the World Championship team twice more, in 2001 and 2005, and helped the United States to silver at the 2002 IAAF World Cup and gold at the 2001 Goodwill Games.
Laviai Nielsen is a British sprinter specialising in the 400 metres. She won several medals as a member of the Great Britain 4x400 metres relay teams, including silver at the 2017 World Championships in the women's 4 x 400 metres, and at the 2023 World Championships in the mixed 4 x 400 metres, and bronze in the women's 4 x 400 metres at the 2022 World Championships. She won two bronze medals at the 2024 Summer Olympics as part of both British 4 x 400 metres relay teams, mixed and women categories.
Natalia Kaczmarek is a Polish sprinter who specialises in the 400 metres. She is the 2024 European champion as well as the European silver medalist from 2022. She also won the bronze medal at the 2024 Summer Olympics. Kaczmarek earned several global medals as part of 4 x 400 m relays, including gold in the mixed event and silver in the women's event at the 2020 Tokyo Olympics.
Rhasidat Adeleke is an Irish sprinter.
Wadeline Jonathas is an American track and field athlete. She won gold medal in the women's 4 × 400 meters event at the 2019 World Athletics Championships and finished in 4th place in the 400 meters, in 49.60 seconds. Jonathas represents United States in women's 400 meters at the 2020 Tokyo Olympics.
Femke Bol is a Dutch track and field athlete who competes in hurdling and sprinting. She specialises in the 400 metres hurdles, where she is the 2023 World Champion, and in the 400 metres, where she is the 2024 World Indoor Champion and the short track world record holder. In the 4 × 400 metres relay, she is the 2023 World Champion and the 2024 World Indoor Champion with the Dutch women's team and the 2024 Olympic Champion with the Dutch mixed team.
Lieke Klaver is a Dutch track and field athlete who competes in sprinting. She specializes in the 200 metres and in the 400 metres. In the 4 × 400 metres relay, she is the 2023 World Champion and the 2024 World Indoor Champion with the Dutch women's team. She won a gold medal at the 2024 Summer Olympics in the mixed 4 x 400 metres relay.
Anna Cockrell is an American track and field athlete competing in sprinting and hurdling. She is a two-time medalist at the 2019 Pan American Games in Lima, Peru and won the silver medal at the 2024 Summer Olympics in 400 m hurdles event.
