Stanisława Zawadzka, also known as Zavaska or Stani, (February 5, 1890 in Warsaw – July 21, 1988 in Skolimów) was a Polish soprano singer. She was a soloist at La Scala in Milan, Covent Garden in London (1923–1935) and Poznań Opera.
From 1955, she was a professor at the National Music School in Warsaw (Państwowa Wyższa Szkoła Muzyczna w Warszawie; PWSM). After World War II, she lectured at the National Music School in Kraków and the National Music School in Warsaw. Her most notable pupil is Stefania Woytowicz.