1798 United States House of Representatives elections in Pennsylvania

Elections to the United States House of Representatives were held in Pennsylvania on October 9, 1798, for the 6th Congress.

Background
Thirteen Representatives (7 Democratic-Republicans and 6 Federalists) had been elected in 1796. One seat had changed from Federalist to Democratic-Republican in a special election in 1797. Two more seats, one held by a Democratic-Republican and one by a Federalist, had become vacant in August, 1798, and were still vacant at the time of the 1798 elections

Congressional districts
Pennsylvania was divided into 12 districts, one of which (the PA's 4th congressional district) was a plural district, with 2 Representatives. These districts remained in use until redistricting after the census of 1800.
 * The PA's 1st congressional district consisted of the City of Philadelphia
 * The PA's 2nd congressional district consisted of Philadelphia County
 * The PA's 3rd congressional district consisted of Chester and Delaware Counties
 * The PA's 4th congressional district (2 seats) consisted of Montgomery, Bucks and Northampton Counties
 * The PA's 5th congressional district consisted of Berks and Luzerne County
 * The PA's 6th congressional district consisted of Northumberland and Dauphin Counties
 * The PA's 7th congressional district consisted of Lancaster County
 * The PA's 8th congressional district consisted of York County
 * The PA's 9th congressional district consisted of Mifflin and Cumberland County
 * The PA's 10th congressional district consisted of Bedford, Huntingdon and Franklin Counties
 * The PA's 11th congressional district consisted of Westmoreland and Fayette Counties
 * The PA's 12th congressional district consisted of Allegheny and Washington Counties

The counties that made up the 5th district did not border each other. That district was therefore made up of two separate pieces rather than being a single contiguous entity

Note: Many of these counties covered much larger areas than they do today, having since been divided into numerous counties. The boundaries of the districts are based on the counties' 1790 borders.

Election results
There were two vacancies and 11 incumbents at the time of the 1798 elections. The two vacancies were filled by special elections held at the same time as the general election. Blair McClenachan (DR) of the PA's 2nd congressional district and William Findley (DR) of the PA's 11th congressional district did not run for re-election. The remaining 9 incumbents (5 Democratic-Republicans and 4 Federalists) ran for re-election. 8 Democratic-Republicans and 5 Federalists were elected, a net increase of 1 seat for the Democratic-Republicans over the 1796 elections.

Special election
Thomas Hartley (F) of the 8th district died on December 21, 1800. A special election was held January 15, 1801 to fill the vacancy.

Stewart had already been elected in the 1800 elections