John Brewster
John Brewster may refer to:
- John Brewster (author) (1753–1842), English author and clergyman
 - John Brewster Jr. (1766–1854), American painter
 - John William Brewster (1930–2019), British politician
 - John Brewster (musician) (born 1949), Australian guitarist
 - John Alexander Brewster (1826–1889), California Surveyor General