Kazimiera Zawistowska de domo Jasienska, pseudonym Ira, (1870–1902) was a Polish poet and translator.
Zawistowska was an author of modernist erotic and landscape poems related with mysticism, symbolism and Parnassianism.
She published her works in Kraków and Warsaw magazines – Zycie, Krytyka and Chimera.
Zawistowska translated poems of Belgian and French symbolists, including Charles Baudelaire, Paul Verlaine, Albert Samain.