1990 World Junior Championships in Athletics – Men's 4 × 400 metres relay

The men's 4x400 metres relay event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.

Final
12 August

Heats
11 August

Participation
According to an unofficial count, 62 athletes from 15 countries participated in the event. • 🇦🇺 australia (5)

• undefined (4)

• 🇧🇬 bulgaria (4)

• 🇨🇺 cuba (4)

• undefined (4)

• undefined (4)

• 🇫🇷 france (4)

• 🇯🇲 jamaica (4)

• 🇯🇵 japan (4)

• 🇰🇪 kenya (4)

• undefined (4)

• undefined (5)

• 🇺🇸 united states (4)

• undefined (4)

• undefined (4)