Katerina Stewart (born July 17, 1997[1]) is an American tennis and pickleball player.

Stewart has won 13 singles and five doubles titles on the ITF Women's Circuit.

Stewart made her WTA Tour debut at the 2014 US Open, with a wildcard entry into the doubles draw alongside Louisa Chirico.

[2] She enrolled at the West Point Preparatory School, starting the program in July 2016.

[4] Her Romanian-born father, Caesar, is the director of the Next Level Tennis Academy in Coral Gables, Florida.