The 2018 World U20 Championships in Athletics, also known as the World Junior Championships, was an international athletics competition for athletes qualifying as juniors (born no earlier than 1 January 1999) which was held at Tampere Stadium in Tampere, Finland on 10–15 July 2018.

[1] The championships were originally awarded to Tampere by the IAAF in March, 2016.

[3] [4] Kenya won the ranking in the medal table.

[7] The following is a list of participating nations with the number of qualified athletes in brackets.

A country without any qualified athlete could enter either one male or one female.