Elections to the United States House of Representatives were held in Pennsylvania on October 13, 1812, for the 13th Congress.

Quick Facts All 23 Pennsylvania seats to the United States House of Representatives, Majority party ...

United States House of Representatives elections in Pennsylvania, 1812

← 1810 October 13, 1812 1814 →
All 23[1] Pennsylvania seats to the United States House of Representatives
Majority party Minority party   Party Democratic-Republican Federalist Last election 17 1 Seats won 22 1 Seat change 5

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In the previous election, 17 Democratic-Republicans and 1 Federalist had been elected to represent Pennsylvania.

Pennsylvania was divided at this time into 15 districts, 9 of which were single-member districts, five of which had two members, and one of which had four members. Following the 1810 census, Pennsylvania underwent redistricting. Most of the new districts had little correspondence to the former districts, for example, the old 3rd district was divided between the new 2nd, 3rd, and 7th districts. The 1st, 9th and 10th districts were unaltered, except for renumbering of the old 9th and 10th to 13th and 12th respectively, and the addition of a 4th seat to the 1st district.

• The 1st district (4 seats) consisted of Delaware and Philadelphia Counties (including the City of Philadelphia)
• The 2nd district (2 seats) consisted of Chester and Montgomery Counties
• The 3rd district (2 seats) consisted of Dauphin and Lancaster County, Pennsylvania
• The 4th district consisted of York County
• The 5th district (2 seats) consisted of Adams, Cumberland and Franklin Counties
• The 6th district (2 seats) consisted of Bucks, Lehigh, Northampton, and Wayne Counties
• The 7th district consisted of Berks and Schuylkill Counties
• The 8th district consisted of Bedford, Cambria, and Franklin Counties
• The 9th district consisted of Centre, Clearfield, Huntingdon, McKean, and Mifflin Counties
• The 10th district (2 seats) consisted of Bradford, Luzerne, Lycoming, Northumberland, Potter, Susquehanna, and Tioga Counties
• The 11th district consisted of Armstrong, Indiana, Jefferson, and Westmoreland Counties
• The 12th district consisted of Washington County
• The 13th district consisted of Fayette and Greene Counties
• The 14th district consisted of Allegheny and Butler Counties
• The 15th district consisted of Beaver, Crawford, Erie, Mercer, Venango and Warren Counties

Sixteen incumbents (all Democratic-Republicans) ran for re-election, of whom 14 were re-elected. The incumbents James Milnor (F) of the 1st district and Joseph Lefever (DR) of the old 3rd district did not run for re-election. The two incumbents who lost re-election lost to members of the same party, while six of the seven open seats were won by Democratic-Republicans, a net increase of 5 seats for the Democratic-Republicans and no change for the Federalists.