thumb|185px|Jan Rubczak (center) at an exhibition in 1931.
Jan Rubczak (18 January 1882, Stanisławów – 27 May 1942, Auschwitz) was a Polish Postimpressionist painter and engraver. Later, he attended the Academy of Visual Arts in Leipzig and the Académie Colarossi in Paris. In 1911, he exhibited at the Salon d'Automne and had his first solo exhibition in 1913. The following year, he displayed his etchings at the Venice Biennale.
He made numerous trips to Brittany and Normandy, where he painted coastal scenes. His agent and patron was the well-known poet and art dealer, Léopold Zborowski.