William A. Smith

William A. Smith or William Alexander Smith may refer to:


 * William Alden Smith (1859–1932), U.S. Representative from the U.S. state of Michigan
 * William Alexander Smith (politician) (1828–1888), U.S. Representative from the U.S. state of North Carolina
 * Sir William Alexander Smith (Boys' Brigade) (1854–1914), founder of the Boys' Brigade
 * William Alexander Smith (boxer) (1904–1955), South African boxer
 * Amor De Cosmos (William Alexander Smith, 1825–1897), Canadian journalist and politician
 * William Andrew Smith (1802–1870), president of Randolph-Macon College
 * William Armstrong Smith, political researcher whose papers reside in the Richard B. Russell Library for Political Research and Studies
 * William Arthur Smith (1918–1989), American artist
 * William A. Smith (Iowa judge) (1870–1958), justice of the Iowa Supreme Court
 * William A. Smith (Kansas judge) (1888-1968), Associate Justice of the Kansas Supreme Court