The 2010 IIHF World U18 Championship Division II was an international under-18 ice hockey competition organised by the International Ice Hockey Federation. Both Division II tournaments made up the third level of the IIHF World U18 Championships. The Group A tournament was played in Narva, Estonia, and the Group B tournament was played in Kyiv, Ukraine. Italy and Slovenia won the Group A and B tournaments respectively and gained promotion to the Division I of the 2011 IIHF World U18 Championships.
The Group A tournament was played in Narva, Estonia, from 13 to 19 March 2010.
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<small>All times are local (EET - ).</small>
The Group B tournament was played in Kyiv, Ukraine, from 22 to 28 March 2010.
<section begin=Division II B/><section end=Division II B/>
<small>All times are local (EET - ) / 28.03.2010 (EEST - ).</small>