The 2018 Individual Speedway Under 21 World Championship was the 42nd edition of the FIM Individual Under-21 World Championship and was staged over three rounds, at Daugavpils, Leszno and Pardubice.

[1] Poland's Maksym Drabik was the defending champion having won the title in 2017.

The title was won by Bartosz Smektała, who beat Drabik by two points.

[2] Smektała had trailed Drabik heading into the final round, however he scored a 21-point maximum to take the title.

In case of a tie between one or more riders in the final overall classification, a run-off decided the 1st, 2nd and 3rd places.