Marcel Janco (b. 1895, Bucharest, Romania – died 1984, Tel Aviv, Israel) was a Romanian-Israeli painter, architect, and one of the founding figures of the Dada movement. After studying in Zurich during World War I, he became a key participant in the avant-garde circle surrounding the Cabaret Voltaire alongside Tristan Tzara, Hans Arp, and Hugo Ball.
Following his return to Romania, Janco played a significant role in the development of modernist art and architecture before immigrating to Mandatory Palestine in 1941. His work evolved from Dadaist and Expressionist influences toward a distinctive visual language shaped by the Mediterranean landscape and the emerging cultural identity of Israel.
A founding member of the New Horizons group and the founder of the artists' village of Ein Hod, Janco remains a central figure in the history of modern and Israeli art. His works are held in major museum collections worldwide.