Otto Bartning (born 12 April 1883 in Karlsruhe; died 20 February 1959 in Darmstadt) was a Modernist German architect, architectural theorist and teacher.
In his early career he developed plans with Walter Gropius for the establishment of the Bauhaus.
He was a member of Der Ring.
In 1951 he was elected president of the Federation of German Architects.