The women's 400 metres event at the 2021 European Athletics U23 Championships was held in Tallinn, Estonia, at Kadriorg Stadium on 8, 9 and 10 July.

Records Prior to the competition, the records were as follows: European U23 record48.60Turin, Italy4 August 1979Championship U23 record50.72Erfurt, Germany16 July 2005

Results Round 1 Qualification rule: First 3 in each heat (Q) and the next 4 fastest (q) advance to the Semi-Finals.

Rank Heat Name Nationality Time Notes 1 1 Silke Lemmens 52.73 Q, NU23R 2 3 Lada Vondrová 53.03 Q 3 1 Barbora Malíková 53.09 Q 4 4 Sokhna Lacoste 53.26 Q 5 4 Mona Mayer 53.32 Q 6 3 Asnāte Kalniņa 53.44 Q, PB 7 4 Mette Baas 53.46 Q 8 3 Anna Polinari 53.53 Q 9 4 Samantha Zago 53.62 q 10 3 Luna Thiel 53.63 q 11 2 Alessandra Bonora 53.69 Q 12 2 Kinga Gacka 54.04 Q 13 1 Andrea Jiménez 54.09 Q 14 3 Aleksandra Formella 54.10 q 15 3 Maryana Shostak 54.17 q, SB 16 1 Veronika Drljačić 54.28 17 2 Yasmin Liverpool 54.45 Q 18 2 Asteria Uzo Limai 54.82 19 4 Veronica Vancardo 54.89 20 2 Věra Holubářová 54.92 21 2 Julia Niederberger 54.96 =PB 22 1 Elif Polat 55.11 23 4 Josefine Tomine Eriksen 55.77 24 1 Hanna Répássy 55.86 25 2 Noragia Catherine Johnson 56.67 26 3 Natália Bučičová 59.63 1 Alina Luchshava

Semifinals Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final.

Rank Heat Name Nationality Time Notes 1 2 Barbora Malíková 52.41 Q 2 1 Lada Vondrová 52.58 Q 3 1 Sokhna Lacoste 52.71 Q 4 2 Silke Lemmens 53.07 Q 5 1 Mona Mayer 53.27 Q 6 1 Samantha Zago 53.48 q 7 2 Mette Baas 53.53 Q 8 2 Kinga Gacka 53.55 q 9 1 Andrea Jiménez 53.67 10 1 Asnāte Kalniņa 53.90 11 1 Anna Polinari 54.07 12 2 Alessandra Bonora 54.14 13 2 Luna Thiel 54.35 14 2 Maryana Shostak 54.39 15 1 Aleksandra Formella 54.41 16 2 Yasmin Liverpool 56.27

Final

Rank Lane Name Nationality Time Notes 6 Lada Vondrová 51.19 PB 3 Barbora Malíková 51.23 =PB 5 Silke Lemmens 52.09 NU23R 4 4 Sokhna Lacoste 52.19 PB 5 7 Mona Mayer 52.25 PB 6 2 Kinga Gacka 52.53 PB 7 8 Mette Baas 53.26 PB 8 1 Samantha Zago 53.57

References