William Brewer (disambiguation)
William Brewer is the name of the following people:
- William Brewer († 1226), English nobleman, civil servant and judge
- William Brewer (nobleman, † 1232) , English nobleman and civil servant
- William Brewer († 1244), English clergyman, Bishop of Exeter, see William Briwere
- William Henry Brewer (1828–1910), American botanist