The women's 400 metres at the 2017 World Para Athletics Championships was held at the Olympic Stadium in London from 14 to 23 July.

Medalists T11 Liu CuiqingGuide: Xu Donglin 58.51 Diana CorazaGuide: Jorge Gasper Cerna 59.11 Joanna MazurGuide: Michal Stawicki 1:01.94T12 Omara DurandGuide: Yuniol Kindelan 52.75 CR Melani Berges GamezGuide: Sergio Sanchez Palancar 57.68 SB—T13 Leilia Adzhametova 56.58 PB Sanaa Benhama 56.66 PB Carolina Duarte 57.52 PBT20 Breanna Clark 56.33 WR Barbara Niewiedział 59.56 Anais Maribel Lara Borja 59.70 PBT34 Hannah Cockroft 58.29 WR Alexa Halko 59.93 AR Kare Adenegan 1:02.94T37 Georgina Hermitage 1:00.29 WR Nataliia Kobzar 1:02.83 PB Jiang Fenfen 1:04.35 PB T38 Kadeena Cox 1:02.87 Yuka Takamatsu 1:08.32 PB Torita Blake 1:09.24T44 Irmgard Bensusan 1:02.33 Federica Maspero 1:03.00 CR Sara Andres Barrio 1:03.08 PBT52 Teruyo Tanaka 1:21.20 Yuka Kiyama 1:26.30—T53 Zhou Hongzhuan 55.22 CR Chelsea McClammer 55.50 Samantha Kinghorn 55.71T54 Tatyana McFadden 53.74 Zou Lihong 54.53 Cheri Madsen 55.05 Events listed in pink were contested but no medals were awarded.

See also List of IPC world records in athletics

References