Sinja Kraus (born 29 April 2002) is an Austrian tennis player. She has career-high WTA rankings of world No. 151 in singles, achieved in May 2023, and No. 303 in doubles, attained in December 2023.
Kraus made her WTA Tour main-draw debut as a wildcard entrant at the 2021 Linz Open, losing to Alison Van Uytvanck in the first round.
As a qualifier, she defeated eighth seed Nadia Podoroska to reach the second round at the WTA 125 2023 Bogota Open, where she lost to Nuria Brancaccio.