Saco Rienk DeBoer (born as Sake Rienk de Boer on September 7, 1883, Ureterp, The Netherlands; died August 1974, Denver, United States), was a landscape architect and civic planner. He was the official Landscape Architect of Denver from 1910 to 1931. He also designed the planned community of Boulder City, Nevada. In 1919, he joined with another Dutchman, M. Walter Pesman, to form a partnership.