The 2020–21 Mestis season was the 21st season of Mestis, the second highest level of ice hockey in Finland after Liiga. Due to promotion/relegation games being cancelled due to COVID-19 pandemic in the last season both semi-finalists from last seasons Suomi-sarja (K-Espoo and FPS) were promoted to Mestis. Therefore, this seasons consisted of 14 teams.[1]
Initially the plan was to have each team play 50 games in total but due to the season being on hold from 2 December 2020 to 10 February 2021 the teams were unable to play the full season.[2][3] Due to this points-per-game determines the order of the teams. SaPKo and RoKi decided not to continue the season when it resumed in February 2021.[4]
Top six advanced straight to the quarter-finals, while teams between 7th and 10th positions played a wild card round for the final two spots. Since the highest series of Finnish hockey is a closed series no team will be promoted to Liiga.
Playoffs are being played in four stages. Each stage before the final is a best-of-3 series, with the final being a best-of-5 series. The teams are reseeded after the quarterfinals, so that the best team by regular season performance to make the semifinals faces the worst team in the semifinals.