2012 World Junior Championships in Athletics – Men's hammer throw

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

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

Qualification
Qual. rule: qualification standard 72.50 m (Q) or at least best 12 qualified (q)

Participation
According to an unofficial count, 47 athletes from 31 countries participated in the event. • 🇦🇷 argentina (1)

• 🇦🇺 australia (1)

• 🇧🇾 belarus (2)

• 🇧🇬 bulgaria (1)

• 🇨🇦 canada (2)

• undefined (1)

• 🇨🇴 colombia (1)

• 🇨🇾 cyprus (1)

• 🇪🇬 egypt (1)

• 🇫🇮 finland (2)

• 🇫🇷 france (1)

• 🇩🇪 germany (2)

• undefined (1)

• 🇭🇺 hungary (2)

• 🇮🇳 india (1)

• 🇮🇪 ireland (2)

• 🇮🇹 italy (2)

• undefined (1)

• 🇱🇹 lithuania (1)

• 🇲🇽 mexico (2)

• 🇳🇴 norway (2)

• 🇵🇱 poland (1)

• 🇶🇦 qatar (1)

• 🇷🇺 russia (2)

• 🇪🇸 spain (2)

• 🇸🇪 sweden (2)

• 🇹🇷 turkey (2)

• 🇺🇦 ukraine (2)

• undefined (2)

• 🇺🇸 united states (2)

• 🇺🇿 uzbekistan (1)