The 2021 World Women's Curling Championship (branded as 2021 LGT World Women's Curling Championship for sponsorship reasons) was held 30 April to 9 May at the Markin MacPhail Centre at Canada Olympic Park in Calgary, Alberta.

[4] During the round-robin against Denmark, the Swiss champions recorded the first eight-ender in World Curling Championship history.

[5] Already sitting seven, Swiss fourth Alina Pätz just needed a draw to the full twelve–foot or better for the eighth point.

Switzerland took a 3–1 lead in the fourth end after their last thrower, Alina Pätz made a double take-out for two points.

RCF then blanked the next three ends, before being forced to a single point in the eighth, with Kovaleva making a tap-up against several Swiss rocks.

[7] Switzerland's fourth stone thrower Alina Pätz won the Frances Brodie Award for sportsmanship.

[14] On 8 February 2021 the World Curling Federation (WCF) announced that the tournament had been cancelled, as permission to host an international sporting event had been withdrawn by local health authorities due to concerns surrounding SARS-CoV-2 variants.

[16] On 5 March, the WCF officially announced that the World Women's Championship would be re-located to Calgary, and rescheduled to 30 April—9 May 2021.

[21] Television coverage ultimately resumed on the morning of May 7 with Alberta Health approving a proposal which minimal staff involvement for the remaining three days of the event.

[26] Pursuant to a December 2020 ruling by the Court of Arbitration for Sport due to the Russian doping scandal, Russia is prohibited from competing under its flag or any national symbols at any Olympic Games or world championships through 16 December 2022, and therefore competed neutrally.

[29] The teams were as follows:[30][31] Skip: Kerri Einarson Third: Val Sweeting Second: Shannon Birchard Lead: Briane Meilleur Alternate: Krysten Karwacki Skip: Han Yu Third: Dong Ziqi Second: Zhang Lijun Lead: Jiang Xindi Alternate: Yan Hui Skip: Anna Kubešková Third: Alžběta Baudyšová Second: Michaela Baudyšová Lead: Ežen Kolčevská Alternate: Petra Vinšová Skip: Madeleine Dupont Third: Mathilde Halse Second: Denise Dupont Lead: Lina Knudsen Alternate: My Larsen Skip: Marie Turmann Third: Liisa Turmann Second: Heili Grossmann Lead: Erika Tuvike Alternate: Kerli Laidsalu Skip: Daniela Jentsch Third: Mia Höhne Second: Klara-Hermine Fomm[a] Lead: Analena Jentsch Alternate: Emira Abbes[a] Skip: Stefania Constantini Third: Marta Lo Deserto Second: Angela Romei Lead: Giulia Zardini Lacedelli Alternate: Elena Dami Skip: Sayaka Yoshimura Third: Kaho Onodera Second: Anna Ohmiya Lead: Yumie Funayama Alternate: Ayami Ito Skip: Alina Kovaleva Third: Yulia Portunova Second: Galina Arsenkina Lead: Ekaterina Kuzmina Alternate: Maria Komarova Skip: Eve Muirhead Third: Vicky Wright Second: Jennifer Dodds Lead: Lauren Gray Alternate: Sophie Sinclair Skip: Kim Eun-jung Third: Kim Kyeong-ae Second: Kim Cho-hi Lead: Kim Seon-yeong Alternate: Kim Yeong-mi Skip: Anna Hasselborg Third: Sara McManus Second: Agnes Knochenhauer Lead: Sofia Mabergs Alternate: Johanna Heldin Fourth: Alina Pätz Skip: Silvana Tirinzoni Second: Esther Neuenschwander Lead: Melanie Barbezat Alternate: Carole Howald Skip: Tabitha Peterson Third: Nina Roth Second: Becca Hamilton Lead: Tara Peterson Alternate: Aileen Geving Year to date World Curling Federation order of merit ranking for each team prior to the event.