Elections to the United States House of Representatives were held in Pennsylvania on October 9, 1804, for the 9th Congress.

Background In the previous election, a delegation of all Democratic-Republicans had been elected to Congress. At this time, a moderate wing of the Democratic-Republican party, known as the Constitutional Republicans or tertium quids ("quids" for short) had broken off from the majority and ran candidates in several districts. The Quids were generally allied with the Federalists.

Congressional districts Pennsylvania was divided into 11 districts, of which four were plural districts with 11 Representatives between them. Several new counties were created between the 1802 elections and the 1804 elections. The districts were: The (3 seats) consisted of Delaware and Philadelphia counties (including the City of Philadelphia) The (3 seats) consisted of Bucks, Luzerne, Montgomery, Northampton, and Wayne Counties The (3 seats) consisted of Berks, Chester, and Lancaster Counties The (2 seats) consisted of Cumberland, Dauphin, Huntingdon, and Mifflin Counties The consisted of Centre, Clearfield, Lycoming, McKean, Northumberland, Potter, and Tioga Counties The consisted of Adams and York Counties The consisted of Bedford and Franklin Counties The consisted of Armstrong, Cambria, Indiana, Jefferson, Somerset, and Westmoreland Counties The consisted of Fayette and Greene Counties The consisted of Washington County The consisted of Allegheny, Beaver, Butler, Crawford, Erie, Mercer, Venango, and Warren Counties

The borders between the 4th, 5th, and 8th districts were altered slightly in the erection of new counties from parts of several counties

Note: Many of these counties covered much larger areas than they do today, having since been divided into smaller counties

Election results Fifteen incumbents ran for re-election, of whom 14 won. The incumbents Isaac Van Horne (DR) of the , Joseph Hiester (DR) of the and William Hoge (DR) of the did not run for re-election. One seat changed from Democratic-Republican to Federalist.

Returns are incomplete for the , , and districts

+1804 United States House election results District Democratic-Republican Quid Federalist 3 seats Joseph Clay (I) 7,427 33.6% Jacob Richards (I) 7,021 31.7% Michael Leib (I) 3,992 18.0% William Penrose 3,685 16.7% 3 seats John Pugh 6,701 32.2% John Ross 2,710 13.0% Frederick Conrad (I) 6,596 21.8% Samuel Preston 268 1.3% Robert Brown (I) 4,532 21.8% 3 seats Christian Lower 9,079 33.1% Thomas Boude 2,929 10.7% John Whitehill (I) 6,309 23.0% Isaac Wayne 2,814 10.3% Isaac Anderson (I) 6,287 22.9% 2 seats David Bard (I) 3,245 34.6% John A. Hanna (I) 2,931 31.2% Oliver Pollock 1,700 18.1% Robert Mitchell 1,514 16.1% Andrew Gregg (I) 3,318 100% John Stewart (I) 1,211 41.5% James Kelly 1,705 58.5% John Rea (I) 1,494 100% William Findley (I) 1,332 64.7% John Brandon 727 35.3% John Smilie (I) 100% John Hamilton 1,068 John Israel No returns John Lucas (I) 2,526 64.8% James O'Hara 1,373 35.2%

Special elections Special election to the 8th Congress William Hoge (DR) of the resigned October 15, 1804. A special election was held November 2, 1804 to fill his seat for the remainder of the 8th Congress

+1804 Special election results District Democratic-Republican Federalist John Hoge 477 52.1% Aaron Lyle 439 47.9%

John Hoge was William's brother.

Special elections to the 9th Congress Two special elections were held on October 8, 1805. In the , John A. Hanna (DR) died on July 23, 1805, while in the , John Lucas (DR) resigned prior to the first meeting of the 9th Congress.

+1805 Special election results District Democratic-Republican Constitutional Republicans (Quid) Federalist Robert Whitehill 6,457 70.7% James Duncan 2,674 29.3% Samuel Smith 3,275 52.7% Nathaniel Irish 681 11.0% James O'Hara 2,263 36.4%

Michael Leib (DR) of the resigned February 14, 1806. A special election was held November 27, 1806

+1806 Special election results District Democratic-Republican Federalist John Porter 2,396 73.1% Richard Falwell 829 25.3% Jonas Preston 53 1.6%

References Electoral data are from The Wilkes University Election Statistics Project