Yvonne Harrison Castro, also spelled Ivonne is a Puerto Rican athlete who specialized in the 400 metres hurdles. She competed at two World Junior Championships, two World Championships, one World Indoor Championships and one Olympic Games.
Maritza Correia, also known by her married name Maritza McClendon, is a former Olympic swimmer from Puerto Rico who swam representing the United States. When she qualified for the U.S. Olympic team in 2004, she became the first Puerto Rican of African descent to be a member of the U.S. Olympic swimming team. She was the first female African-American swimmer for the United States to win an Olympic medal. She also became the first black American swimmer to set an American and world swimming record.
Tamsyn Carolyn Lewis is an Australian media personality and former track and field athlete who won a total of eighteen Australian Championships across the 400 metres, 800 metres and 400m hurdles. She first represented Australia in 1994, and won the 800 metres in the 2008 World Indoor Championships.
Monique Hennagan is an American athlete who mainly competes in the 400 metres. She won her first relay medal at the 1999 World Indoor Championships and her second in 2003.
California Molefe is a Botswana runner who won a silver medal in 400 metres at the 2006 IAAF World Indoor Championships in Moscow, becoming the first Botswana athlete to win a major international medal.
Louis Jacobus van Zyl, better known as L. J. van Zyl, is a South African athlete competing in the 400 metre hurdles. He is the South African record holder in the event with a personal best of 47.66 seconds, which he achieved twice, three months apart. His time ranks him in the all-time top 25. He is a three-time African Champion in the event and competed for his country at the 2008, 2012 and 2016 Summer Olympics.
Amantle Montsho is a female sprinter from Botswana who specializes in the 400 metres. She represented her country at the 2004 and 2008 Summer Olympics, reaching the final at the latter edition. She was the first woman to represent Botswana at the Olympics. She has also competed at the World Championships in Athletics and the IAAF World Indoor Championships, and is the former World Champion over the 400m, winning in a personal best time of 49.56 in Daegu.
Joy Amechi Eze is a Nigerian sprinter who specializes in the 400 metres. Her personal best time is 51.20 seconds, set during the 2007 All-Africa Games.
Halima Hachlaf is a Moroccan runner who specializes in the 800 metres. She is the younger sister of Abdelkader Hachlaf, an international steeplechase athlete. She won silver medals in the 800 m at the Mediterranean Games and Jeux de la Francophonie in 2009. Her personal best for the distance is 1:58.27.
Nataliya Pyhyda is a Ukrainian track and field sprinter who specializes in the 200 and 400 metres. Her personal best times are 22.82 seconds (2008) and 50.62 seconds (2015), respectively.
Asami Chiba, or Tanno, is a Japanese sprinter who specialises in the 400 metres. She is the Japanese record holder in the event, and has also broken the national record in the 4×400 metres relay on multiple occasions. She is a member of Natureal Athlete Club in Japan and is coached by Kazuhisa Kawamoto.
Phara Anacharsis is a French athlete who specializes in the 400 metres and the 400 metres hurdles.
Seltana Aït Hammou is a Moroccan middle-distance runner who specialises in the 800 metres. She represented her country at the 2004 Summer Olympics and has also competed at the World Championships in Athletics and the IAAF World Indoor Championships. She has also been the gold medallist at number of major events including the 2001 Mediterranean Games, the 2003 Military World Games, the 2007 Pan Arab Games and the 2009 Jeux de la Francophonie.
Shellene Williams is a retired female track and field sprinter from Jamaica. She specialized in the 200 metres and the 400 metres. Her personal best time in the women's 200 metres was 23.50 seconds, achieved in May 2004, and her 400 m best was 51.94 seconds, set in June 2004. Williams won a bronze medal in the women's 4×100 metres relay at the 2003 Pan American Games, alongside Lacena Golding-Clarke, Judyth Kitson, and Danielle Browning.
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.
Gnima Faye is a Senegalese track and field athlete who competes in the 100 metres hurdles. She was the 2012 African champion in the event and has a personal best of 13.17 seconds.
Janieve Russell is a Jamaican track and field athlete who competes mainly in the 400 metres hurdles and the 400 metres sprint. She won an Olympic bronze medal in the 4 × 400 m relay in Tokyo 2021, where she also finished fourth in the 400m hurdles final in a personal best of 53.08 secs. She is a four-time Commonwealth Games gold medallist, winning the 400m hurdles title in 2018 and 2022, and the 4 × 400 m relay in 2014 and 2018. She has also won two relay silvers at the World Championships and a relay gold at the World Indoor Championships.
Safa Aissaoui is a retired Tunisian middle- and long-distance runner who mostly specialized in the 800 and 1500 metres.
Sarah Bouaoudia is a retired Algerian heptathlete.
El Hadj Sethe Mbow is a retired Senegalese athlete who specialized in the 400 metres hurdles.
South Africa 
