William Carbys Zimmerman (1856–1932) was an American architect. He was the Illinois State Architect from 1905 to 1915, designing many state-funded buildings, especially at the University of Illinois. He was a partner of Flanders & Zimmerman.

Biography Zimmerman was born in 1856 in Thiensville, Wisconsin, and attended the Massachusetts Institute of Technology. Upon graduation in 1880s he moved to Chicago, Illinois. He was admitted as a junior partner in John J. Flanders' architectural firm in 1886. There, Zimmerman gained a reputation as an able designer of residences in popular revival styles. He became a fellow of the American Institute of Architects and opened an independent practice in Steinway Hall in 1898. Zimmerman at first continued to design houses, largely in the Chicago neighborhoods of Rogers Park, Kenwood, and Edgewater.

Zimmerman was appointed Illinois State Architect in 1905, a role he held for ten years. This presented Zimmerman with the opportunity to design major works on behalf of the state government. He was also named the architect to Chicago's West Park Commission in 1907. During this period, Zimmerman began to shift to a style more influenced by the Prairie School. He later admitted his son and son-in-law as partners of Zimmerman, Saxe, and Zimmerman.

List of works All buildings in Illinois unless otherwise noted William Carbys Zimmerman House, Chicago, 1887 Eckhart & Swan Mill, Chicago, 1897 Archer Daniels Midland Wheat Mill (1897), Chicago 5544 S. Woodlawn Avenue, Chicago, 1898 Gross House, 1100 and 1106 Oak Avenue, Evanston, 1901 Charles Adams Goodyear House, Chicago, 1902 Nichols House, Winnetka, 1905 Joseph Downey House, Chicago, 1906 Percy Eckhart House, Kenilworth, 1906 Frank K. Hoover House, Chicago, 1906 William M. Crilly House, Chicago, 1908 Illinois Supreme Court Building, Springfield, Illinois, 1908 Pinewold, Lake Forest, 1908 University of Illinois Natural History Building additions, Urbana, 1909 and 1910 Ray O. West House, Chicago, 1909 W. B. Wolff House, Chicago, 1909 William O. Johnson House, Chicago, 1910 Warren House, 2829 Sheridan Place, Evanston, 1912 University of Illinois Commerce Building (now the David Dodds Henry Administration Building), Urbana, 1912 University of Illinois English Building renovation, Urbana, 1913 Pulaski Park, Chicago, 1914 University of Illinois Armory, Urbana, 1914 Stateville Correctional Center, Crest Hill, Illinois 1917 - 1925 Thomas Cusack Co. District Headquarters, Davenport, Iowa, 1922 Aurora Elks Lodge No. 705, Aurora, 1926 Vitagraph Film Exchange Building, Kansas City, Missouri, 1930 Col. Roger Hosmer Morse House, Lake Forest, 1931 Walgreen Drug Store/La Epoca Department Store, Downtown Miami Historic District, 1936 University of Illinois Physics Building, Urbana Chicago 7th Regiment Armory, Chicago Douglass Park Refectory, Chicago Oak Woods Cemetery Chapel and Crematory Louis F. Swift House, Lake Forest University of Illinois Stock Pavilion, Urbana

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