The 2021 CS Finlandia Trophy was held on October 7–10, 2021 in Espoo, Finland. It was part of the 2021–22 ISU Challenger Series. Medals were awarded in the disciplines of men's singles, women's singles, pairs, and ice dance. After the previous Challenger Series event, the Nepela Memorial, was cancelled, the event organizers received a higher-than-anticipated interest number of entries. As a result, the competition was extended one day to begin on Thursday, October 7, rather than the original Friday, October 8 start date.