The women's 400 metres event at the 2017 European Athletics U23 Championships was held in Bydgoszcz, Poland, at Zdzisław Krzyszkowiak Stadium on 14 and 15 July.

Medalists Gold Gunta Latiševa-Čudare Silver Laura Müller Bronze Laura de Witte

Results Heats 14 JulyHeats results

Qualification rule: First 2 (Q) and the next 2 fastest (q) qualified for the final.

Rank Heat Name Nationality Time Notes 1 1 Gunta Latiševa-Čudare 51.80 Q, EL 2 2 Anita Horvat 51.94 Q, NR 3 1 Laura de Witte 52.15 Q, NU23R 4 1 Laura Müller 52.32 q 5 3 Laviai Nielsen 52.80 Q 6 2 Modesta Morauskaitė 52.81 Q, PB 7 2 Dominika Muraszewska 52.88 q, PB 8 2 Kateryna Klymyuk 52.90 9 3 Déborah Sananes 52.96 Q 10 3 Adrianna Janowicz 53.07 PB 11 2 Evelin Nádházy 53.22 PB 12 3 Eva Hovenkamp 53.25 13 1 Alexandra Troiani 53.47 PB 14 3 Ylenia Vitale 53.58 15 1 Mariola Karaś 53.78 16 2 Susanne Walli 53.94 SB 17 1 Despina Mourta 54.02 18 2 Sara Dorthea Jensen 54.06 SB 19 3 Helena Jiranová 54.20 20 1 Jenna Bromell 54.34 21 2 Virginia Troiani 54.44 22 3 Maja Pogorevc 54.59 23 1 Anja Benko 54.99 24 3 Sophie Becker 54.99 25 3 Vijona Kryeziu 57.53 SB

Final 15 JulyFinal results

Rank Lane Name Nationality Time Notes 4 Gunta Latiševa-Čudare 52.00 3 Laura Müller 52.42 5 Laura de Witte 52.51 4 7 Anita Horvat 53.06 5 6 Laviai Nielsen 53.18 6 2 Dominika Muraszewska 53.62 7 9 Modesta Morauskaitė 54.06 8 8 Déborah Sananes 54.25

References