Ekaterina Olegovna Efimova (; born 3 July 1993) is a Russian volleyball player for Beşiktaş Ayos and the Russian national team.

She participated at the 2017 Women's European Volleyball Championship.CEV profile and 2018 FIVB Volleyball Women's Nations League.

National team 2019 World Cup - Bronze medal (with Russia)

Clubs Zarechye Odintsovo (2014–2015) Omichka Omsk (oct 2015–dec 2015) Dinamo Krasnodar (2015–2016) Yenisey Krasnoyarsk (2016–2018) WVC Dynamo Moscow (2018–2021) Leningradka Saint Petersburg (2021–2023) Beşiktaş Ayos (2023–)

References