Pennsylvania's 12th Congressional District

Pennsylvania's 12th Congressional District is represented by Summer Lee (Democrat), who has held the seat since 2023. Lee has an overall VoteSee report card grade of A, voted in 100% of roll-call votes on bills this Congress, and votes with the Democratic majority 92% of the time. The district includes Pittsburgh, Bethel Park, and Monroeville. It takes in all or part of 2 counties, and 86% of residents live in Allegheny County. About 761,000 people live in the district, and the median household income is $71,986.

Current Representative

Summer Lee (Democrat) has represented Pennsylvania's 12th Congressional District since 2023.

VoteSee report card grade: A
Attendance in the 119th Congress: 100% of roll-call votes on bills
Votes with the Democrat majority: 92%

See Summer Lee's full voting record and issue positions →

2026 Election

U.S. House: Pennsylvania 12th District

Winner: Summer Lee.

Incumbent Summer Lee is running for re-election. 2 candidates were on the Nov 3, 2026 ballot.

Summer Lee (Democratic), incumbent: raised $1.6M, $1.7M cash on hand; VoteSee report card A; 100% attendance; votes with the Democratic majority 92% of the time
James Hayes (Republican): raised $81K, $11K cash on hand

Polls: No public polls

See the full 2026 race →

District Demographics

Population: 760,856
Median household income: $71,986
Median age: 40
Median home value: $205,700
Bachelor's degree or higher: 41.9%

Source: American Community Survey 2020–2024 5-year estimates, 119th Congress boundaries.

How Lee Voted Recently

Yea on American Enrichment Deployment Act (Nov 9, 2026) — Passed
Yea on Nuclear REFUEL (Recycling Efficient Fuels Utilizing Expedited Licensing) Act (Nov 9, 2026) — Passed
Yea on Retire through Ownership Act (Sep 16, 2026) — Passed
Yea on Water Resources Development Act of 2026 (Sep 16, 2026) — Passed
Nay on Ratepayer Protection Act (Sep 16, 2026) — Passed

Breaks with the Democrat majority

Nay on National Fraud Enforcement Division Act of 2026 (Sep 16, 2026) — Passed
Nay on Ratepayer Protection Act (Sep 16, 2026) — Passed
Nay on Continuing Appropriations Act, 2027 (Sep 1, 2026) — Passed

Who Held This Seat Before

Members of Congress who previously represented Pennsylvania's 12th Congressional District. District lines are redrawn after each census, so earlier members may have represented a different area under this number.

Fred Keller — Republican (2019–2023)
Tom Marino — Republican (2019)
Keith Rothfus — Republican (2013–2019)
Mark Critz — Democrat (2010–2013)
John Murtha — Democrat (1973–2010)
John Saylor — Republican (1973–1975)
John Whalley — Republican (1963–1973)
Ivor Fenton — Republican (1945–1963)
Thomas Miller — Republican (1941–1945)
John Flannery — Democrat (1937–1943)
Charles Turpin — Republican (1929–1937)
John Casey — Democrat (1927–1931)

Where the District Is

Pennsylvania's 12th Congressional District covers 426 square miles of land. Boundaries are for the current (119th) Congress.

Counties

Allegheny County (part): 86% of residents
Westmoreland County (part): 15% of residents

Largest communities

Pittsburgh
Bethel Park
Monroeville
Plum
Baldwin
Murrysville
West Mifflin
McKeesport