Andrzej Stanisław Badeński was a Polish sprinter who specialized in the 400 metres. He won a bronze medal in that event at the 1964 Summer Olympics, and won the gold medal in that event at the European Indoor Championships in 1968 and in 1971.
The 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor running track, it is one lap around the track. Runners start in staggered positions and race in separate lanes for the entire course. In many countries, athletes previously competed in the 440-yard dash (402.336 m)—which is a quarter of a mile and was referred to as the "quarter-mile"—instead of the 400 m (437.445 yards), though this distance is now obsolete.
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 joint 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.
The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap, totaling 1600 meters. It is traditionally the final event of a track meet. The first leg and the first bend of the second leg are run in lanes. Start lines are thus staggered over a greater distance than in an individual 400 metres race; the runners then typically move to the inside of the track. The slightly longer 4 × 440 yards relay, on an Imperial distance, was a formerly run British Commonwealth and American event, until metrication was completed in the 1970s.
Leslie Djhone is a French track and field athlete who competes in the 400 metres and 4 x 400 metres relay.
Clive Terrelonge is a Jamaican former track and field athlete and current coach for the University of Connecticut. Before coaching, he was an accomplished collegiate and professional athlete who specialized in the 800m and 400m.
Melaine Walker is a Jamaican 400 metres hurdler. She was born in Kingston. Walker is the former Olympic 400 m hurdles champion. She held the Olympic record of 52.64, set at the 2008 Beijing Olympics, and her time of 52.42 seconds at the 2009 World Championships in Berlin was the second fastest time in history at the time.
Kevin Borlée is a Belgian sprinter, who specializes in the 400 metres. He is a member of the Borlée family.
Michael Walter Mathieu is a retired Bahamian sprinter hailing from Freeport, Grand Bahama who specialized in the 200 metres and 400 metres. He was part of the Bahamian silver medal-winning team in the men's 4×400 metres relay at the 2008 Beijing Olympics, running second leg and recording a 44.0 split, and the gold medal-winning team at the 2012 Summer Olympics. He was also a part of second place relay team at the 2007 World Championships. He won the bronze medal in the 4x400 metres relay in the 2016 Summer Olympics.
Jonathan Borlée is a former Belgian sprinter, who specializes in the 400 metres. He is a member of the Borlée family.
Arman "Gino" Hall is an American sprinter specializing in the 400m. He is a World and Olympic gold medalist as a member of USA's 2014 and 2016 4 × 400 m relay teams.
Francena Lynette McCorory is a retired American track and field athlete, known primarily for running the 400 meters. She was the 2011 World bronze medalist in the 400 meters and was a member of the gold medal-winning 2012 and 2016 United States Olympic 4 x 400 m relay teams. She was the IAAF 400 meter Indoor World Champion in 2014. McCorory retired in 2021.
Tony McQuay is an American track and field athlete who specializes in the 400 meters. He is a member of the 2012 and 2016 United States Olympic teams, winning a silver medal in the 4 × 400 m relay in 2012 and a gold in the same event in 2016. He is also a two time World Champion in this event.
Afia Neliah Charles is a sprinter from Antigua and Barbuda who specializes in the 400 metre dash.
Ashley Spencer is an American track and field athlete who competes in the 400 metres and the 400 metres hurdles. In the 400m hurdles, she is the 2016 Olympic bronze medalist. In the 400m, she is the 2012 World Junior Champion and the 2016 World Indoor silver medalist. She is coached by 1996 Olympic bronze medalist Tonya Buford-Bailey.
Vernon Larnard Norwood is an American track and field athlete who specializes in the 400 meters.
Courtney Okolo is an American track and field sprinter who usually competes in the 400 metres. She starred at Carrollton (Texas) Newman Smith High School where she won multiple individual state championships.
La'Sean Pickstock is a male sprinter from Nassau, Bahamas, who mainly competed in the 400m. He ran second leg of the 4x400 relay at the 2010 IAAF World Indoor Championships in Athletics in Doha, Qatar and first leg of the 4 × 400 m relay at the 2010 Commonwealth Games that placed fourth in the final. He ran the anchor leg of the 4 x 400m Relay at the NACAC U23 Championships in Athletics where the Bahamas won the silver medal in the final. He attended CR.Walker High School in the Bahamas before joining countryman and Olympic gold medalist Ramon Miller at Dickinson State University where he was an All American. He now works for the Dickinson Police Department in Dickinson, North Dakota.
Rai Benjamin is an American hurdler and sprinter specializing in the 400 m and 400 m hurdles. He is the second fastest man in history in the 400 m hurdles with a personal best time of 46.17 s. He won a silver medal at his first Olympic Games in 2021 and won the 400 m hurdles race at the 2024 Summer Olympics. Benjamin also won silver medals and at the World Championships in 2019 and 2022 in the men's 400 m hurdles, and gold medals in the 4 × 400 m relay in 2019 and 2021.
Elija Godwin is an American athlete who specializes in the 400 meters.
Bahamas 
