The 2020–21 Naisten Liiga season was the thirty-eighth season of the Naisten Liiga, Finland's elite women's ice hockey league, since the league’s creation in 1982. The season began, as scheduled, on 5 September 2020, making the Naisten Liiga the first women's national ice hockey league in Europe and, quite likely, in the world to return to play for the 2020–21 season. League business Number of teams When the 2019–20 Naisten Liiga season was cancelled due to the COVID-19 pandemic, the league qualification series () had not been completed. At the time of cancellation, Lukko Naiset had amassed an unreachable points advantage and secured their place in the Naisten Liiga and APV Naiset had been mathematically relegated to the Naisten Mestis but it was still possible for either RoKi Naiset or TPS Naiset to qualify. Recognizing that it would be unfair to relegate either RoKi or TPS, the Finnish Ice Hockey Association announced that both teams would participate in the 2020–21 Naisten Liiga season, increasing the number of teams in the preliminary round from ten to eleven. League placement rankings In an effort to account for expected cancellations of some matches due to COVID-19 safety protocols, the Finnish Ice Hockey Association announced league rankings would be determined by the average points per game of each team rather than the absolute point total traditionally used. For example, a team with two wins in two games played (6 points total, average 3.0) ranks higher in the league table than a team with four wins, one overtime loss, and one regulation loss (13 points total, average 2.17). Coaching changes Teams Preliminary series The addition of another team necessitated slight modification of the season format introduced for the 2019–20 season. With eleven participating teams, the twenty-game preliminary series () was played strictly as a double round-robin without the addition of the two extra Opening Weekend Tournament games typically needed. The preliminaries were scheduled to be played during 5 September to 13 December 2020. The season began as scheduled on 5 September 2020, making the Naisten Liiga the first women's national ice hockey league in Europe – and, quite possibly, in the world – to return to play for the 2020–21 season. The first game of the season saw Ilves Tampere beat TPS Turku 4–3 in overtime at Tesoman jäähalli. On 1 December 2020, an emergency meeting of the Finnish Ice Hockey Association was held in