Kseniya (or Ksenia or Xenia) Boguslavskaya (Russian: Ксения Богуславская, 24 January 1892–3 May 1972) was a Russian avant-garde artist (Futurist, Suprematist), poet and interior decorator. Her husband Ivan Puni was also a painter. She seems to be the originator of the Mavva (symbol of the World Evil) featured in poems written by Velimir Khlebnikov.
Born in St. Petersburg, she studied art in Paris from 1911 to 1913. She returned to St. Petersburg in 1913 and married Ivan Puni. Their apartment in St Petersburg became a meeting place for avant-garde artists and poets. With Puni she published the cubo-futurist booklet Roaring Parnassus («Рыкающий Парнас») in 1914.
During the year 1915, Boguslavskaya joined the Supremus («Супремус»), a group of avant-garde artists. Some group members included (Liubov Popova, Nadezhda Udaltsova, Varvara Stepanova, Aleksandra Ekster, Ivan Kliun, Nina Genke-Meller, Ivan Puni and others. The group was led by the founder of Suprematism, Kazimir Malevich.
In 1915-1916 with other Suprematist artists, she worked in the Verbovka Village Folk Centre in the Ukrainian province near Kiev. She exhibited at the first Futurist exhibition in 1915, and helped organise the Suprematist 0.10 Exhibition in late 1915. She was also a member of Jack of Diamonds (1919) and Mir iskusstva (1916–1918).