Sophia Zaïkowska (17 May 1874 – 27 February 1939) was a Russian-born French writer and activist, individualist anarchist of Polish descent, nutritionist and early promoter of veganism.

Zaïkowska studied physical and natural sciences in Geneva before moving to France in 1898; she specialized in nutrition.

[1] Before the First World War, she contributed to various libertarian journals such as L'Education libertaire, L'Autarcie and in particular La Vie anarchiste, of which she became the editor in 1920.

[2] Interested in Georges Butaud's project of creating an anarchist colony, she became his partner and collaborator in 1921 in the journal Le Néo-Naturien.

She was passionate about the ideas of Victor Lorenc, a close friend of the couple, and organized the vegan kitchen in the Rue Mathis in Paris.