The 3rd 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.
The men's 1500 metres event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.
The men's 3000 metres steeplechase event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 10 and 12 August.
The men's 110 metres hurdles event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 10 and 11 August. 106.7 cm (3'6) hurdles were used.
The men's high jump event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.
The men's pole vault event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 8 and 9 August.
The men's triple jump event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.
The men's shot put event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 10 and 11 August. A 7257g shot was used.
The men's javelin throw event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 9 and 10 August.
The women'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.
The women's 800 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.
The women's 1500 metres event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.
The women's 3000 metres event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 9 and 12 August.
The women's 10,000 metres event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 10 August.
The women's 400 metres hurdles event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 8, 9 and 10 August.
The women's high jump event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 9 and 10 August.
The women's long jump event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 10 and 11 August.
The women's shot put event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 8 and 9 August.
The women's discus throw event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 11 and 12 August.
The women's 5000 metres walk event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 12 August.
