William Hoyt

William Hoyt may refer to:


 * William Hoyt (athlete) (1875–1954), American pole vaulter
 * William B. Hoyt (1937–1992), member of the New York State Assembly
 * William Dana Hoyt (born 1880), phycologist with the botanical abbreviation "Hoyt"
 * William Lloyd Hoyt (born 1930), Canadian lawyer and judge
 * William R. Hoyt, state senator for South Carolina during the Reconstruction Era