Ecaterina Sergeyevna Visnevscaia or Ekaterina Vishnevskaya (Russian: Екатерина Сергеевна Вишневская, romanized: Ekaterina Sergeevna Vishnevskaya; born 27 November 1999) is a Russian-Moldovan tennis player.

She represented Russia from 2016 to 2021, until she gained Moldovan citizenship in 2022.

Visnevscaia has won one singles title and four doubles titles on the ITF Women's Circuit.

On 22 October 2018, she reached her best singles ranking of world No.

Visnevscaia made her Billie Jean King Cup debut for Moldova in 2022.