The 2016 IIHF World U18 Championship Division III Group A and 2016 IIHF World U18 Championship Division III Group B were a pair of international under-18 men's ice hockey tournaments run by the International Ice Hockey Federation.

The Division III Group A tournament began on 14 March 2016 in Sofia, Bulgaria at the Winter Sports Palace.

[1] Bulgaria, Chinese Taipei, Israel and Mexico returned to compete in Division III Group A after missing promotion in the 2015 tournament.

[5] Mexico finished the tournament in last place after losing all five of their games and was relegated to Division III Group B for 2017.

[7] The Division III Group B tournament began on 14 February 2016 in Cape Town, South Africa at the Ice Station.

[9] Hong Kong and New Zealand returned to compete in Division III Group B after missing promotion in the 2015 tournament.