1990 World Junior Championships in Athletics – Men's 400 metres

The men's 400 metres event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 8, 9 and 10 August.

Final
10 August

Semifinals
9 August

Heats
8 August

Participation
According to an unofficial count, 35 athletes from 25 countries participated in the event. • undefined (1)

• 🇦🇬 antigua and barbuda (1)

• 🇦🇺 australia (2)

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• 🇧🇷 brazil (2)

• 🇧🇬 bulgaria (1)

• 🇨🇦 canada (1)

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• undefined (2)

• 🇪🇹 ethiopia (1)

• 🇯🇲 jamaica (1)

• 🇯🇵 japan (2)

• 🇰🇪 kenya (2)

• 🇳🇿 new zealand (1)

• undefined (1)

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• 🇶🇦 qatar (1)

• 🇸🇱 sierra leone (1)

• undefined (2)

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• undefined (2)

• 🇺🇸 united states (2)

• undefined (1)

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