William W. Smith may refer to:
William W. Smith (admiral) (1888–1966), United States Navy admiral during World War II William W. Smith (Arkansas judge) (1838–1888), justice of the Arkansas Supreme Court William Watson Smith (1892–?), World War I flying ace William Wensley Smith (1887–1955), founder of W. W. Smith Insurance Ltd William Wright Smith (1875–1956), Scottish botanist and horticulturalist W. Wheeler Smith (William Wheeler Smith) (c. 1838–c. 1908), American architect and real estate developer
See also Willie W. Smith, American physiologist William Smith (disambiguation)