Stanisława Zawadzka, also known as Zavaska or Stani, (5 February 1890 in Warsaw – 21 July 1988 in Skolimów) was a Polish soprano singer. She was a soloist at La Scala in Milan, Covent Garden in London (1923 to 1935) and Poznań Opera.

In 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.