U.S. House seat · lines in effect since 2022
Pennsylvania's 10th District
A district of about 777,000 people, 35% of adults with a bachelor's degree. It votes R+4.9 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+12.8 | D+0.2 | No race | R+3.1 | No race |
| Governor | No race | D+9.0 | No race | No race | No race |
| U.S. House | No race | No race | R+7.7 | R+1.3 | D+10.1 |
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-10.
Higher than 54% of seats.
Higher than 71% of seats.
Lower than 61% of seats.
Higher than 60% of seats.
Higher than 63% of seats.
Denser than 61% 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. 3 of the 4 flipped this year.
OH-1533% college gradsR+9.4Flipped DFL-13
34% college gradsR+12.1Held RMI-4
33% college gradsR+5.2Flipped DPA-7
21% Hispanic · 33% college gradsR+2.3Flipped 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.
- Janelle Stelson (D)
2027– · Won 2026 by 10.1 - Scott Perry (R)
2023–2027 · Won 2022 by 7.7, 2024 by 1.3
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)