2012 World Junior Championships in Athletics – Men's 800 metres

The men's 800 metres at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13, 14, and 15 July.

[1][2][3] Prior to the competition[update], the existing world junior and championship records were as follows.

Qualification: The first 3 of each heat (Q) and the 3 fastest times (q) qualified Qualification: The first 2 of each heat (Q) and the 2 fastest times (q) qualified According to an unofficial count, 60 athletes from 41 countries participated in the event.