The 1990 World Junior Championships in Athletics was the 1990 edition of the World Junior Championships in Athletics.

It was held in Plovdiv, Bulgaria on 8–12 August.

*   Host nation (Bulgaria)According to an unofficial count through an unofficial result list,[1] 987 athletes from 86 countries participated in the event.

The number of athletes is in agreement, but there is one country less than the official number of 87 as published.

[2]