Pennsylvania House of Representatives seat · lines in effect since 2022
Pennsylvania House District 31
A district of about 67,000 people, 68% of adults with a bachelor's degree. It votes D+15.9 relative to the nation for president.
Where it sits among all 203 seats
Every Pennsylvania House of Representatives 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
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 | |
|---|---|---|---|---|
| U.S. Senate | R+1.1 | D+22.3 | No race | No race |
| Governor | No race | D+26.5 | No race | No race |
| Pennsylvania House of Representatives | No race | No race | D+21.4 | D+17.7 |
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 203 seats. Small marks are other seats in Pennsylvania. The black marker is District 31.
Higher than 97% of seats.
Lower than 85% of seats.
Higher than 50% of seats.
Lower than 93% of seats.
Higher than 83% of seats.
Denser than 57% 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. 1 of the 4 flipped this year.
District 16867% college gradsD+21.2Held DDistrict 30
66% college gradsD+7.3Held DDistrict 29
64% college gradsD+15.6Held DDistrict 160
64% college gradsD+5.7Flipped 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.
- Perry Warren (D)
2027– · Won 2026 unopposed - Perry Sinclair Warren Jr. (D)
2025–2027 · Won 2024 by 17.7 - Perry Sinclair Warren Jr. (D)
2023–2025 · Won 2022 by 21.4
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)