The women's long jump at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 20 and 22 August.

[1] The qualification took place on 20 August, in two groups, starting at 11:00.

Athletes attaining a mark of at least 6.35 metres ( Q ) or at least the 12 best performers ( q ) qualified for the final.

[2][3] The final was held on 22 August at 16:28.

[4]