Greta Knutson or Knutson-Tzara (also known as Greta Knutson; 1899–1983) was a Swedish modernist visual artist, art critic, short story writer and poet. A student of André Lhote who adopted Abstraction, Cubism and Surrealism, she was also noted for her interest in phenomenology. Knutson was married to Romanian-born author and co-founder of Dadaism Tristan Tzara, but they later divorced.