William A. Smith

• William Alden Smith, U.S. Representative and U.S. Senator from the U.S. state of Michigan
• William Alexander Smith (politician), U.S. Representative from the U.S. state of North Carolina
• Sir William Alexander Smith (Boys' Brigade), founder of the Boys' Brigade
• William Alexander Smith (boxer), South African boxer
• William Alexander Smith, birth name of T. C. Curtis, UK-based Jamaican singer
• Amor De Cosmos, Canadian journalist and politician
• William Andrew Smith, 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, American artist
• William A. Smith (Iowa judge), justice of the Iowa Supreme Court
• William A. Smith (Kansas judge), Associate Justice of the Kansas Supreme Court