The men's 400 metres hurdles competition at the 2012 Summer Olympics in London, United Kingdom took place on 3–6 August at the Olympic Stadium. There were 49 competitors from 33 nations. The event was won by Félix Sánchez of the Dominican Republic, the second victory in the men's long hurdles for both the man and the nation. Sánchez was the eighth man to win multiple medals in the event and fourth to win two golds. Michael Tinsley of the United States earned silver. Javier Culson's bronze was Puerto Rico's first medal in the event.
The women's 400 metres hurdles competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Olympic Stadium between 15 and 18 August.
The women's 400 metres hurdles at the 2015 World Championships in Athletics was held at the Beijing National Stadium on 23, 24 and 26 August.
The men's 110 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 6−7 August.
The women's 400 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 7−8 and 10 August.
The women's 400 metres hurdles event at the 2020 Summer Olympics took place between 31 July and 4 August 2021 at the Japan National Stadium. 39 athletes from 25 nations competed.
The women's 4 × 400 metres relay event at the 2020 Summer Olympics took place on 5 and 7 August 2021 at the Japan National Stadium. There were 16 competing relay teams, with each team having at least 5 members from which 4 were selected in each round.
The women's 400 metres hurdles competition of the athletics events at the 2019 Pan American Games will take place between the 6 and 8 of August at the 2019 Pan American Games Athletics Stadium. The defending Pan American Games champion is Shamier Little from the United States.
The women's 400 metres hurdles at the 2019 World Athletics Championships was held at the Khalifa International Stadium in Doha, Qatar, from 1 to 4 October 2019.
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.
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.
The women's 400 metres at the 2022 World Athletics Indoor Championships took place on 18 and 19 March 2022.
The women's 4 × 400 metres relay at the 2022 World Athletics Indoor Championships took place on 20 March 2022.
The men's 400 metres hurdles at the 2022 World Athletics Championships was held at the Hayward Field in Eugene from 16 to 19 July 2022.
The women's 400 metres hurdles at the 2022 World Athletics Championships was held at the Hayward Field in Eugene from 19 to 22 July 2022. It was won by Sydney McLaughlin in a world record time of 50.68 seconds.
The men's 400 metres hurdles at the 2023 World Athletics Championships was held at the National Athletics Centre in Budapest, Hungary from 20 to 23 August 2023.
The women's 400 metres at the 2023 World Athletics Championships was held at the National Athletics Centre in Budapest, Hungary from 20 to 23 August 2023.
The women's 4 × 400 metres relay was a two-round track event of the 2023 World Athletics Championships held at the National Athletics Centre in Budapest. Seventeen national relay teams participated in the two heats that took place on 26 August 2023. Nine teams qualified for the final, the last track race of the championships, on 27 August 2023. The final was won by the Dutch team consisting of Eveline Saalberg, Lieke Klaver, Cathelijn Peeters, and Femke Bol in 3:20.72 minutes, which was a world-leading time and a national record. In second place finished the Jamaican team with Candice McLeod, Janieve Russell, Nickisha Pryce, and Stacey-Ann Williams in 3:20.88 minutes and third was Great Britain and Northern Ireland with Laviai Nielsen, Amber Anning, Ama Pipi, and Nicole Yeargin in 3:21.04 minutes.
The women's 400 metres at the 2024 World Athletics Indoor Championships took place in the Commonwealth Arena in Glasgow, Scotland, United Kingdom. The four heats and two semi-finals were held on 1 March 2024. The final was held on 2 March 2024, where Femke Bol won the gold medal finishing in a new short track world record time of 49.17 s, followed by Lieke Klaver in 50.16 s and Alexis Holmes in 50.24 s.
The women's 4 × 400 metres relay at the 2024 World Athletics Indoor Championships took place on 3 March 2024.
