The women's 800 metres at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 10−11 and 13 August.

Ajeé Wilson is an American middle-distance runner who specializes in the 800 meters. She is the 2022 World indoor champion at the 800 meter distance, after earning silver medals in 2016 and 2018. Wilson won bronze medals at both the 2017 and 2019 World Athletics Championships. She is the second-fastest American of all time in the event with a time of 1m 55.61s, and she holds North American indoor record.