| John Hahn | |
| State: | Pennsylvania |
| District: | 2nd |
| Term Start: | March 4, 1815 |
| Term End: | March 3, 1817 |
| Preceded: | See below |
| Succeeded: | See below |
| Birth Date: | 30 October 1776 |
| Birth Place: | New Hanover Township, Pennsylvania |
| Death Place: | New Hanover Township, Pennsylvania |
| Party: | Democratic-Republican |
| Alma Mater: | University of Pennsylvania |
John Hahn (October 30, 1776 – February 26, 1823) was an American politician from Pennsylvania who served as a member of the U.S. House of Representatives for Pennsylvania's 2nd congressional district from 1815 to 1817.
John Hahn was born in New Hanover Township, Pennsylvania. He studied at the University of Pennsylvania School of Medicine, graduating in 1798,[1] and practiced medicine. Hahn was elected as a Republican to the Fourteenth Congress. He resumed the practice of medicine and also engaged in agricultural pursuits. He died in New Hanover Township in 1823, and was interred in Falkner Swamp Graveyard.