Dankmar Adler (July 3, 1844 – April 16, 1900) was a German-born American architect and civil engineer. He is best known for his fifteen-year partnership with Louis Sullivan, during which they designed influential skyscrapers that boldly addressed their steel skeleton through their exterior design: the Wainwright Building in St. Louis, Missouri (1891), the Chicago Stock Exchange Building (1894), and the Guaranty Building in Buffalo, New York (1896).