U.S. House seat · lines in effect since 2022
Pennsylvania's 1st District
A district of about 772,000 people, 45% of adults with a bachelor's degree. It votes D+1.3 relative to the nation for president.
Source: 2026 results: civicAPI; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET
Where it sits among all 435 seats
Every U.S. House seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Labels below the bar mark 16 other seats in Pennsylvania.
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2018 | 2022 | 2024 | 2026 | |
|---|---|---|---|---|---|
| U.S. Senate | R+5.9 | D+16.3 | No race | No race | No race |
| Governor | No race | D+20.7 | No race | No race | No race |
| U.S. House | No race | No race | R+9.7 | R+12.8 | D+5.5 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 435 seats. Small marks are other seats in Pennsylvania. The black marker is PA-1.
Higher than 81% of seats.
Higher than 66% of seats.
Lower than 76% of seats.
Lower than 73% of seats.
Higher than 72% of seats.
Denser than 70% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean. 2 of the 4 flipped this year.
PA-1745% college gradsD+5.8Held DMN-2
44% college gradsD+6.3Held DNE-2
42% college gradsD+5.1Flipped DMO-2
50% college gradsR+8.1Flipped D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2022.
- Bob Harvie (D)
2027– · Won 2026 by 5.5 - Brian K. Fitzpatrick (R)
2023–2027 · Won 2022 by 9.7, 2024 by 12.8
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)