Ekaterina Andreevna Kazionova (; born 13 January 1999) is a Russian tennis player.
Kazionova has career-high WTA rankings of 280 in singles and 310 in doubles. Up to date, she has won three singles titles and eleven doubles tournaments on the ITF Circuit.
Kazionova made her WTA Tour main-draw debut at the 2022 Morocco Open, after receiving a wildcard entry into the doubles tournament, partnering with Yasmine Kabbaj.