- Lead
- 150,953
- Total
- 398,086
- vs nation
- R+36.4
Pennsylvania 9th Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 141,301
- Total
- 387,046
- vs nation
- R+41.0
- Lead
- 133,312
- Total
- 340,680
- vs nation
- R+41.2
- Lead
- 66,407
- Total
- 309,611
- vs nation
- R+25.3
- Lead
- 46,503
- Total
- 329,662
- vs nation
- R+21.4
- Lead
- 79,315
- Total
- 327,865
- vs nation
- R+21.7
- Lead
- 55,626
- Total
- 285,167
- vs nation
- R+20.0
- Lead
- 22,279
- Total
- 264,749
- vs nation
- R+16.9
Key facts
- 2024 presidential margin
- R+37.9MIT Election Lab
- Population
- 764,8972024 5-year
- Population density
- 126 / sq mi2024 5-year · TIGER/Line
- Land area
- 6,073 sq miTIGER/Line
- Median household income
- $69,4832024 5-year
- White (non-Hispanic)
- 87.6%2024 5-year
- Black
- 2.1%2024 5-year
- Hispanic / Latino
- 5.8%2024 5-year
- Peak Democratic margin
- D+22.1 in 1912MIT Election Lab
- Peak Republican margin
- R+39.1 in 2016MIT Election Lab
- Most similar
- Congressional District 14, PA · twin score 95.9
presidential history
Party record book
Pennsylvania 9th Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
58.7%
172,878 votes · D+17.6 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 51.1%
Republican
Donald Trump2024
68.5%
272,729 votes · R+37.9 · modeled estimate
Runner-up · Richard Nixon, 1972 · 67.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
172,878votes
58.7% of the vote · D+17.6 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 168,049 votes
Republican
Donald Trump2024
272,729votes
68.5% of the vote · R+37.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 261,238 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Woodrow Wilson1912
+2.5pts D vs U.S.
Place D+22.1 · U.S. D+19.5 · a third-party candidate carried the Place · modeled estimate
Runner-up · Grover Cleveland, 1892 · −1.3 pts
Republican
Donald Trump2016
+41.2pts R vs U.S.
Place R+39.1 · U.S. D+2.1 · modeled estimate
Runner-up · Donald Trump, 2020 · +41.0 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Spanning rural south-central Pennsylvania from the Maryland border toward the Susquehanna Valley, PA-9 delivered a 37.9-point Republican presidential margin in 2024, making it among the state's least competitive districts.
Across the recorded series it reached a Democratic high of 22.1 points in 1912 and a Republican high of 39.1 points in 2016. Between 2020 and 2024 the district moved 1.4 points toward the Republican candidate; the 2024 margin was 37.9 points.
A population of 764,897, a 88% non-Hispanic-white share, and a median household income of $69,483 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 14 and Congressional District 15.
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Pennsylvania 9th Congressional District. Akashic. https://akashic.app/cd/4209/. Accessed May 20, 2026. License: CC BY 4.0.