John B. Hamilton | |
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| 2nd Surgeon General of the United States | |
| In office April 3, 1879 – June 1, 1891 | |
| President | Rutherford B. Hayes James Garfield Chester A. Arthur Grover Cleveland Benjamin Harrison |
| Preceded by | John Maynard Woodworth |
| Succeeded by | Walter Wyman |
| Personal details | |
| Born | December 1, 1847 Otter Creek Township, Jersey County, Illinois, US |
| Died | December 24, 1898 (aged 51) Elgin, Illinois, US |
| Signature | .png){kind=small} |
John Brown Hamilton (December 1, 1847 – December 24, 1898) was an American physician and soldier. He was appointed the second Surgeon General of the United States from 1879 to 1891.