John Stewart (date of birth unknown; died 1820) was a United States representative from Pennsylvania.
He is known to have completed preparatory studies.
From 1789 to 1796, he was elected as a Democratic-Republican to the Sixth Congress to fill the vacancy caused by the death of Thomas Hartley.
He was reelected as a Republican to the Seventh and Eighth Congresses, holding office from January 15, 1801 to March 3, 1805.
He died in Elmwood, near York, in Spring Garden Township.