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.
Konstantinos "Kostas" Kenteris, also spelled as Konstadinos "Costas" Kederis is a Greek former athlete. He won gold medals in the 200 metres at the 2000 Summer Olympics, the 2001 World Championships in Athletics and the 2002 European Championships in Athletics, making him the only European sprinter to win the gold medal in all three major competitions and the only European World Champion in the 200 metres races. Additionally, he has won two gold, three silver and two bronze medals in the European Cup, as well as three gold medals in the 200 metres at the Athens Grand Prix Tsiklitiria. He is also a 14-time golden medalist at the Greek Athletics Championships and a five-time golden medalist at the Greek Indoor Athletics Championships. He withdrew from the 2004 Summer Olympics, held in his home country, after a doping violation.
Antonio McKay Sr. is a former track and field athlete who specialized in the 400 meters.
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.
Gregory Haughton is a Jamaican 400 metres runner. He won three Olympic medals, one at the 1996 Summer Olympics and two at the 2000 Summer Olympics. His personal best for the 400 m was 44.56 seconds.
Brigitte Heike Meissner is a retired German athlete. She competed mainly in the 400 metres hurdles, but also spent two seasons specializing in the 800 metres. Notable achievements include a silver medal at the 2002 European Championships, medals in 4 x 400 metres relay at the 1994 European Championships and the 1997 World Indoor Championships and a fourth place at the 1995 World Championships.
Tatyana Petrovna Alekseyeva is a former 400 metres sprinter from Novosibirsk, Russia. Her personal best result was 49.98. She retired from international competition after 1998. A three-time individual Russian national champion, she won 400 m silver medals at the IAAF World Indoor Championships and European Athletics Indoor Championships. With the Russian 4 × 400 metres relay team, she set an indoor world record to win gold at the 1997 IAAF World Indoor Championships and set the Russian record of 3:18.38 as silver medallist at the 1993 World Championships in Athletics.
Leslie Djhone is a French track and field athlete who competes in the 400 metres and 4 x 400 metres relay.
Sunday Bada was a Nigerian sprinter who specialized in the 400 metres event. He won three medals at the World Indoor Championships, including a gold medal in 1997. His personal best time was 44.63 seconds, and with 45.51 seconds indoor he holds the African indoor record. He set a national record in the 4 x 400 metres relay at the 2000 Olympics, where the Nigerian team also won gold medals after the disqualification of the US.
John Paul Lyndon Regis, MBE is an English former sprinter. During his career, he won gold medals in the 200 metres at the 1989 World Indoor Championships and the 1990 European Championships, and a silver medal in the distance at the 1993 World Championships.
Jeffrey Norman Rouse is an American former competition swimmer, three-time Olympic champion, and former world record-holder in three events.
Jan Werner was a Polish sprinter who specialized in the 200 and 400 metres.
Michael Mathieu is a retired Bahamian sprinter 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.
Mark David Hylton is a former British 400 metres sprinter. Hylton won a silver medal in the relay at the 1996 Summer Olympics in Atlanta.
Deon Minor is an American former track and field athlete who specialized in the 400 meter dash. He won two consecutive gold medals in the relay at the IAAF World Indoor Championships from 1997 to 1999, setting a world record mark of 3:02.83 minutes in the latter competition.
Yousef Ahmed Masrahi is a Saudi Arabian track and field athlete, who specialises in the 400 metres sprint. His personal best time for the event is 43.93 seconds, set in 2015, and is the Asian record.
Luguelín Miguel Santos Aquino is a Dominican sprinter, who specialises in the 400 m. He was the silver medallist in the event at the 2012 London Olympics at the age of eighteen. His personal best is 44.11 seconds.
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.
David Verburg is an American track and field athlete who specializes in the 400 meters. He holds gold medals in the 4 × 400 m relay from the 2016 Olympics; the 2013 and 2015 World Championships; and the 2014 Indoor World Championships.
Phyllis Chanez Francis is an American track and field athlete. She won the gold medal at the 2017 World Championships in the 400 metres and 4 × 400 metres relay events.
