John Thayer
John Thayer is the name of the following people:
- John A. Thayer (1857–1917), American politician
- John B. Thayer (1862-1912), American sportsman and railroad entrepreneur
- John Eliot Thayer (1862–1933), American ornithologist
- John M. Thayer (1820–1906), American politician
- John R. Thayer (1845–1916), American politician