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.

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.

[1] Prior to the start of the tournament, the Mongolian national team announced they would withdraw, citing financial reasons.

Group A played a round-robin schedule followed by a classification round.