Alexander or Oleksandr Bogomazov (Russian: Александр Константинович Богомазов, Ukrainian: Олександр Костянтинович Богомазов; born April 7, 1880 in Yampil - on June 3, 1930 in Kiev) was Ukrainian painter, known artist and modern art theoretician of Russian avant-garde. In 1914 Alexander wrote his treatise The Art of Painting and the Elements. In it he analyzed the interaction between Object, Artist, Picture, and Spectator and sets the theoretical foundation of modern art. During his artistic life Alexander Bogomazov mastered several art styles. The most known are Cubo-Futurism (1913-1917) and Spectralism (1920-1930).

Bogomazov was born in Yampol, Kharkov Governorate. From 1896 to 1902 Oleksandr Bogomazov attended the Institute for Agriculture in Kherson. From 1902 to 1905 he attended the Kiev Art School (KKHU), at the same time he had a close contact with Alexander Archipenko and Aleksandra Ekster.

In 1905 he participated in political demonstrations and strikes. In the same year he was expelled from the Kiev Art School. In 1906 he studied in the studio of S. Swiatoslavskiy. Bogomazov had an exhibition in Kiev, together with Archipenko. That year he moved to Moscow and became the student of Fodor Rerberg and Konstantin Yuon.

In 1907 he returned to Kiev. After 1907 he had regular exhibitions in Kiev, including the Association of RUSSIANARTists and the Moscow Society of Independent Artists. In 1908 he participated in the exhibition with the group of artists Zveno (The Link) in Kiev together with David Burliuk, Wladimir Burliuk, Aleksandra Ekster and others.

In 1911 he journeyed to Finland.In the years 1912-1915 he taught at a school for the deaf and mute in Kiev. From 1913 to 1914 he studied the works of the Italian Futurists. At this time he developed art theories, and published his essay The Art of Painting and the Elements. In 1914 he organized the exhibition Kiltse ("The Ring") in Kiev, together with A.Ekster among others. In 1915 Bogomazov moved to the Caucasus, where he worked as a teacher and painter.

In 1919 he taught at the First State Studio for Paintings and Decorative art in Kiev. From 1919 to 1920 he was the Head of the Department for Art Education in the Ukrainian Commissariat for Visual Art. At the same time he was the co-founder of the Ukrainian Agitprop Movement, and created designs for the Agitprom movement. From 1922 to 1930 he was taught at the Kiev Art Academy (KKHI) together with Vadim Meller, Vladimir Tatlin, Victor Palmov. In 1927 he was a founding member of the Association of the Revolutionary Masters of Ukraine (ARMU), together with D.Burliuk, V.Meller, V.Palmov, V. Ermilov and others. In the same year he participated in the All-Ukrainian Exhibition Ten years October (Kharkov, Kiev, Odessa), together with Tatlin, Meller, Palmov, Epshtein among others.

Alexander Bogomazov died on June 3, 1930 in Kiev.