William Kapp

William Edward Kapp (August 20, 1891 in Toledo – 1969) was an American architect. He earned his architectural degree at the University of Pennsylvania. For the majority of his career, he worked for the firm Smith, Hinchman & Grylls.

Kapp is known as the lead architect on a number of buildings including the following:

• The Players, a clubhouse in Detroit, Michigan (1925)
• Meadow Brook Hall(1926–1929)
• Wilson Theatre (now the Music Hall Center for the Performing Arts) in Detroit, Michigan (1928)
• The Horace H. Rackham School of Graduate Studies Building, University of Michigan, Ann Arbor, Michigan (1938)
• Temple Israel in West Bloomfield, Michigan (1949)
• Flint Journal Building in Flint, Michigan (1952–1954)