John Thayer
John Thayer may refer to:
Politicians
- John R. Thayer, member of the United States House of Representatives from Massachusetts
- John A. Thayer, member of the United States House of Representatives from Massachusetts
- John Milton Thayer, United States Senator from Nebraska and Civil War general
Others
- John Thayer , Boston priest
- John B. Thayer, American cricketer and businessman who died on the RMS Titanic
- Jack Thayer, his son, survivor of the Titanic sinking
- Jack G. Thayer, American radio executive and disc jockey
- John Thayer , American amateur ornithologist
- John M. Thayer, Connecticut Supreme Court judge