The 2007 IIHF World U18 Championship Division I were a pair of international under-18 ice hockey tournaments run by the International Ice Hockey Federation. The Division I tournaments made up the second level of competition at the 2007 IIHF World U18 Championships. The Group A tournament took place between 6 April and 12 April 2007 in Maribor, Slovenia and the Group B tournament took place between 4 April and 10 April 2007 in Sanok, Poland. Belarus and Denmark won the Group A and Group B tournaments respectively and gained promotion to the Championship Division for the 2008 IIHF World U18 Championships. While France finished last in Group A and Great Britain last in Group B and were both relegated to Division II for 2008.