2021 World Athletics U20 Championships – Women's 400 metres

Women's 400 metres
at the 2021 World Athletics U20 Championships
Women's 400 metres ; at the 2021 World Athletics U20 Championships
Venue	Kasarani Stadium
Dates	18 August (heats); 21 August (final)
Competitors	21 from 16 nations
Winning time	51.55
Medalists
	← 2018 2022 →

Records

Standing records prior to the 2021 World Athletics U20 Championships
World U20 Record	Grit Breuer (GER)	49.42	Tokyo, Japan	27 August 1991
Championship Record	Ashley Spencer (USA)	50.50	Barcelona, Spain	13 July 2012
World U20 Leading	Christine Mboma (NAM)	49.22	Windhoek, Namibia	17 April 2021

Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.^[2]

Rank	Heat	Name	Nationality	Time	Note
1	3	Imaobong Nse Uko	Nigeria	52.33	Q
2	1	Kornelia Lesiewicz	Poland	52.63	Q
3	3	Sylvia Chelangat	Kenya	53.49	Q, PB
4	3	Priya Mohan	India	53.79	q
5	2	Oneika McAnnuff	Jamaica	54.13	Q
6	2	Precious Molepo	South Africa	54.41	Q
7	1	Ella Clayton	Canada	54.51	Q
8	1	Tetyana Kharashchuk	Ukraine	54.65	q
9	2	Anna Orlova	Ukraine	54.68
10	2	Veronika Arkhipova	Authorised Neutral Athletes	54.87
11	3	Erica Barbosa	Brazil	54.94
12	2	Summy	India	55.43
13	1	Mathilde Descoux	France	55.54
14	2	Alexandra Almici	Italy	55.70
15	3	Koumba Sidibe	Mali	56.49
16	1	Annalee Robinson	Jamaica	56.56
17	1	Opeyemi Deborah Oke	Nigeria	57.30
18	2	Aishath Himna Hassan	Maldives	58.90	NR
	1	Lucie Zavadilová	Czech Republic	DNF
	3	Nikola Bisová	Czech Republic	DQ	TR16.8
	3	Caitlyn Bobb	Bermuda	DQ	TR17.3.1

The final was held on 21 August at 16:59.^[3]

Rank	Lane	Name	Nationality	Time	Note
	6	Imaobong Nse Uko	Nigeria	51.55	PB
	5	Kornelia Lesiewicz	Poland	51.97	PB
	4	Sylvia Chelangat	Kenya	52.23	PB
4	3	Priya Mohan	India	52.77	PB
5	8	Precious Molepo	South Africa	53.98
6	7	Ella Clayton	Canada	54.10	PB
7	1	Tetyana Kharashchuk	Ukraine	54.49
	3	Oneika McAnnuff	Jamaica	DNS