William Knowles

William Knowles is the name of:


 * William Standish Knowles (1917–2012), American chemist
 * William Erskine Knowles (1872–1951), Canadian Liberal MP (1906–1921)
 * William David Knowles (1908–2000), Canadian Progressive Conservative MP (1968–1979)
 * William James Knowles (1832–1927), Irish amateur archaeologist
 * W. C. G. Knowles (William Charles Goddard Knowles, 1908–1969), British businessman in Hong Kong