2012 World Junior Championships in Athletics – Men's 1500 metres

The men's 1500 metres at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 10 and 12 July.

Records
, the existing world junior and championship records were as follows.

Heats
Qualification: The first 3 of each heat (Q) and the 3 fastest times (q) qualified

Participation
According to an unofficial count, 37 athletes from 26 countries participated in the event. • undefined (1)

• 🇦🇩 andorra (1)

• 🇦🇷 argentina (1)

• 🇧🇷 brazil (1)

• 🇨🇦 canada (2)

• undefined (1)

• 🇪🇷 eritrea (1)

• 🇪🇹 ethiopia (2)

• 🇩🇪 germany (2)

• 🇮🇪 ireland (2)

• 🇮🇹 italy (2)

• 🇯🇵 japan (1)

• 🇰🇪 kenya (2)

• undefined (1)

• 🇲🇦 morocco (2)

• 🇳🇿 new zealand (2)

• 🇳🇴 norway (2)

• 🇵🇱 poland (1)

• 🇶🇦 qatar (1)

• 🇷🇼 rwanda (1)

• undefined (1)

• 🇪🇸 spain (2)

• 🇹🇳 tunisia (1)

• 🇹🇷 turkey (1)

• undefined (1)

• 🇺🇸 united states (2)