John Porter was a U.S. Representative from Pennsylvania from December 8, 1806, to March 4, 1811. He was born in Pennsylvania, but his birth date is unknown. He was elected as a Democratic-Republican to the Ninth United States Congress to fill the vacancy caused by the resignation of Michael Leib. He was then re-elected to the Tenth and Eleventh Congresses.
He was a member of the Pennsylvania State Senate from 1801 to 1805.
1806–1808 alongside: Joseph Clay and Jacob Richards
1808–1809 alongside: Jacob Richards and Benjamin Say
1809–1811 alongside: William Anderson and Adam Seybert