The women's 100 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 11−12 August.

[1] World record holder Kendra Harrison (USA) was the slowest time qualifier to the final, while 2011 champion Sally Pearson (AUS), Dawn Harper-Nelson (USA) and Pamela Dutkiewicz (GER) were the top three fastest.

In the final, Harrison was out slightly faster than Pearson, Christina Manning (USA) and heptathlete Nadine Visser over the first hurdle.

Harrison held the lead until she rattled the third hurdle, where Pearson and Manning advanced, about even over the fourth hurdle, with a wall of Harrison, Dutkiewicz, Visser, Harper-Nelson and Alina Talay (BLR) mere inches behind.

But Pearson was gaining a little ground at every hurdle as Harper-Nelson edged forward ahead of Manning.