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.

[1] Before the competition records were as follows:[2] The following records were set at the competition:[3] The standard to qualify automatically for entry was 2:01.00.

[4] The event schedule, in local time (UTC+1), is as follows:[5] The first round took place on 10 August in six heats as follows:[6] The first three in each heat ( Q ) and the next six fastest ( q ) qualified for the semifinals.

The overall results were as follows:[7] The semifinals took place on 11 August in three heats as follows:[8] The first two in each heat ( Q ) and the next two fastest ( q ) qualified for the final.

The overall results were as follows:[9] The final took place on 13 August at 20:10.