William Schwartz may refer to:
Will Schwartz, American pop musician William Schwartz (law professor) (1933–2017), American law professor and corporate director William Schwartz (physician) (1922–2009), nephrologist William Bernstein Schwartz Jr. (1922–2010), American businessman and United States Ambassador to the Bahamas William C. Schwartz (1927–2000), civic leader in Central Florida and laser industry pioneer William J. Schwartz (born 1950), American neurologist and professor William S. Schwartz (1896–1977), American artist