The 2017 IIHF U18 World Championship Division II was two international under-18 ice hockey tournaments organised by the International Ice Hockey Federation.

The Division II A and Division II B tournaments represent the fourth and the fifth tier of the IIHF World U18 Championship.

The Division II A tournament was played in Gangneung, South Korea, from 2 to 8 April 2017.

(Korea Standard Time – UTC+9) The Division II B tournament was played in Belgrade, Serbia, from 13 to 19 March 2017.

[3] Australia achieved the unusual distinction of being promoted in consecutive years.