William Brewer may refer to:
Billy Brewer (1935–2018), American football player and head coach Billy Brewer (baseball) (born 1968), retired Major League Baseball player Billy Brewer (footballer) (1893–1914), English footballer William Brewer (Illinois politician), 19th century Illinois state representative William Brewer (justice) (died 1226), administrator and justice in England William Briwere (died 1244), his nephew, medieval bishop of Exeter William Brewer (MP) (1811–1881), British Member of Parliament for Colchester William Brewer (novelist), American novelist William Brewer (sheriff) (died 1817), Sheriff of Norfolk County, Massachusetts 1811 to 1812 William A. Brewer III, American trial lawyer William D. Brewer (1922–2009), American diplomat William Henry Brewer (1828–1910), American botanist William J. Brewer (1843–1878), American soldier and Medal of Honor recipient William M. Brewer (died 1921), mayor of Omaha, Nebraska, 1873–1874