The boys' 800 metres at the 2013 World Youth Championships in Athletics was held on 10, 11 and 13 July.

Prior to the competition, the following records were as follows.

Qualification rule: first 4 of each heat (Q) and the next 4 fastest qualified.

[1] Qualification rule: first 2 of each heat (Q) plus the 2 fastest times (q) qualified.

[2] Results:[3]