Valeriia Olianovskaia (also spelt as Valeriya Olyanovskaya, ; born 12 March 2001) is a Russian-born Polish tennis player.
Olianovskaia has career-high WTA rankings of 553 in singles, achieved on 4 December 2023, and 792 in doubles, set on 3 October 2022.
Olianovskaia made her WTA Tour main-draw debut at the 2021 WTA Poland Open, after she received a wildcard into the singles tournament. She lost to Anna Bondár in the first round.