Ludwig Karl Hilberseimer (4 September, 1885 - 6 May, 1967) was a German architect and urban planner best known for his ties to the Bauhaus and to Mies van der Rohe, as well as for his work in urban planning at the Illinois Institute of Technology, in Chicago. Hilberseimer studied architecture at the Karlsruhe Technical University from 1906 to 1910. He before completing his studies. He then worked in the architectural office of Peter Behrens in Berlin. Thereafter he worked in different practices as well as an independent architect and urban planner and published numerous theoretical writings on art, architecture and urban planning.

In 1927, he was one of the fifteen architects who contributed to the influential modernist Weissenhof Estate exhibition.

In 1929, Hilberseimer was hired by Hannes Meyer to teach at the Bauhaus in Dessau. Like many members of the Bauhaus, he emigrated to America where he arrived in 1938 to work for the practice of Mies van der Rohe in Chicago while heading the department of Urban Planning at the Illinois Institute of Technology College of Architecture. Later he also became the director of Chicago's city planning office.