The 2021 IIHF World U18 Championship was the 22nd such event hosted by the International Ice Hockey Federation. Teams would have participated at several levels of competition. The competition also would have served as qualifications for the 2022 competition. All tournaments other than the top division tournament were cancelled by the IIHF on November 18, 2020, due to the COVID-19 pandemic. The United States finished without a medal for the first time since 2003.