2012 World Junior Championships in Athletics – Men's 100 metres

The men's 100 metres at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 10 and 11 July.

Heats
Qualification: The first 2 of each heat (Q) and the 6 fastest times (q) qualified

Semifinal
Qualification: The first 2 of each heat (Q) and the 2 fastest times (q) qualified

Final
Wind: +0.1 m/s

Participation
According to an unofficial count, 71 athletes from 55 countries participated in the event. • undefined (1)

• 🇦🇮 anguilla (1)

• 🇦🇬 antigua and barbuda (2)

• 🇦🇺 australia (2)

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• 🇧🇭 bahrain (1)

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• 🇧🇯 benin (1)

• 🇧🇴 bolivia (1)

• 🇧🇷 brazil (2)

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• 🇨🇦 canada (2)

• 🇨🇳 china (1)

• 🇰🇲 comoros (1)

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• 🇨🇿 czech republic (2)

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• 🇫🇮 finland (1)

• 🇫🇷 france (2)

• 🇩🇪 germany (2)

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• 🇮🇹 italy (1)

• 🇯🇲 jamaica (2)

• 🇯🇵 japan (2)

• 🇰🇪 kenya (1)

• 🇲🇴 macao (1)

• 🇲🇽 mexico (2)

• 🇲🇦 morocco (1)

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• 🇳🇿 new zealand (1)

• 🇵🇰 pakistan (1)

• 🇵🇦 panama (1)

• 🇵🇪 peru (1)

• 🇵🇱 poland (1)

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• 🇶🇦 qatar (1)

• 🇷🇺 russia (2)

• 🇸🇲 san marino (1)

• 🇸🇹 sao tome and principe (1)

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• 🇪🇸 spain (1)

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• 🇹🇯 tajikistan (1)

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• 🇺🇦 ukraine (1)

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• 🇺🇸 united states (2)

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