William Brewer
William Brewer may refer to:
- Billy Brewer, American football player and head coach
- Billy Brewer (baseball), retired Major League Baseball player
- Billy Brewer (footballer), English footballer
- William Brewer (justice), administrator and justice in England
- *William Briwere, his nephew, medieval bishop of Exeter
- William Brewer (MP), British Member of Parliament for Colchester
- William Brewer (novelist), American novelist
- William Brewer (sheriff), Sheriff of Norfolk County, Massachusetts 1811 to 1812
- William A. Brewer III, American trial lawyer
- William D. Brewer, American diplomat
- William Henry Brewer, American botanist
- William J. Brewer, American soldier and Medal of Honor recipient
- William M. Brewer, mayor of Omaha, Nebraska, 1873–1874