The 2011 IIHF World U18 Championship Division III was an international under-18 ice hockey competition organised by the International Ice Hockey Federation. Both Division III tournaments made up the fourth level of the IIHF World U18 Championships. The Group A tournament was played in Taipei City, Chinese Taipei, and the Group B tournament was played in Mexico City, Mexico. Australia and Iceland won the Group A and B tournaments respectively and gained promotion to the Division II of the 2012 IIHF World U18 Championships.