Willy Jaeckel (10 February 1888, Breslau — 30 January 1944, Berlin) was a German Expressionist painter and lithographer.
Jaeckel’s father was a public lands manager and he originally intended to become a forest ranger, but poor health forced him to change his plans. From 1906 to 1908, he studied at the art school in Breslau, then enrolled at the Dresden Academy of Fine Arts, under the direction of Otto Gußmann, an ornamental painter. In 1913, he moved to Berlin to work as a free-lance artist and became a member of the Berlin Secession in 1915. Four years later, he was elected a member of the Prussian Academy of Arts and became a teacher at the University of the Arts in 1925.