Otto Freundlich (10 July 1878 – 9 March 1943) was a German painter and sculptor of Jewish origin and one of the first generation of abstract artists, Freundlich was also a great admirer of cubism. 

Freundlich was born in Stolp, Province of Pomerania, Prussia. His mother was a first cousin of the writer Samuel Lublinski. Otto studied dentistry before deciding to become an artist. He went to Paris in 1908, living in Montmartre in Bateau Lavoir near to Pablo Picasso, Braque and others. In 1914 he returned to Germany. After World War I, he became politically active as a member of the November Group. In 1919, he organized the first Dada – exhibition in Cologne with Max Ernst and Johannes Theodor Baargeld. In 1925, he joined the Abstraction-Création group.

After 1925, Otto Freundlich lived and worked mainly in France. In Germany, his work was condemned by the Nazis as degenerate and removed from public display. Some works were seized and displayed at the infamous Nazi exhibition of degenerate art including his monumental sculpture Der Neue Mensch (The New Human) which was photographed unsympathetically and used as the cover illustration of the exhibition catalogue.

While in Paris, he became a member of the Union des Artistes Allemandes Libres. With outbreak of World War II, Freundlich was interned by the French authorities but released, for a time, under the influence of Pablo Picasso. In 1943 he was arrested and deported to Majdanek Concentration Camp, where he was murdered on the day he arrived.