Heinrich Tessenow (7 April 1876 – 1 November 1950) was a German architect, professor, and urban planner active at the time of the Weimar Republic.

Tessenow is considered together with Hans Poelzig, Bruno Taut, Peter Behrens, Fritz Höger, Ernst May, Erich Mendelsohn, Walter Gropius and Ludwig Mies van der Rohe as one of the most important personalities of the architectural German panorama during the time of the Weimar Republic.

Tessenow and fellow architects Hermann Muthesius and Richard Riemerschmid are credited with the 1908 Gartenstadt Hellerau, near Dresden, a housing project that was the first tangible result of the influence of the English garden city movement in Germany.

Speer's memoirs describe Tessenow's personal, discursive, informal teaching style, and his preference for architecture that expressed national culture and simplified forms.

Until the end of World War II he lived retired in his country house, spending most of his time studying the reconstruction of urban centres in the Pomerania and Mecklenburg regions.