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
See also Jonathan Brewster (disambiguation), multiple persons