The 2021 World Junior Figure Skating Championships were scheduled to be held from March 1–7, 2021 in Harbin, China.

On November 24, 2020, the International Skating Union announced the cancellation of the event, citing "the pandemic developments and related impact on the organizers and participants.

The Chinese Skating Association was scheduled to host several events during the season, including the World Junior Championships.

Earlier in the season, the CSA was the only federation to host a wholly domestic Grand Prix event, the 2020 Cup of China, due to the country's stringent quarantine restrictions during the COVID-19 pandemic.

[1] Based on the results of the 2020 World Junior Championships, each ISU member nation can field one to three entries per discipline.