- Lead
- 1,093
- Total
- 33,249
- vs nation
- R+1.8
Pennsylvania 18th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,695
- Total
- 33,033
- vs nation
- D+0.7
- Lead
- 2,410
- Total
- 28,682
- vs nation
- D+6.3
- Lead
- 2,430
- Total
- 27,064
- vs nation
- D+5.1
- Lead
- 4,611
- Total
- 28,223
- vs nation
- D+9.1
- Lead
- 2,847
- Total
- 26,839
- vs nation
- D+13.1
- Lead
- 2,625
- Total
- 22,017
- vs nation
- D+11.4
- Lead
- 1,989
- Total
- 18,694
- vs nation
- D+2.1
Key facts
- 2024 presidential margin
- R+3.3MIT Election Lab
- Population
- 63,6892024 5-year
- Population density
- 3,153 / sq mi2024 5-year · TIGER/Line
- Land area
- 20.2 sq miTIGER/Line
- Median household income
- $85,5502024 5-year
- White (non-Hispanic)
- 63.5%2024 5-year
- Black
- 8.1%2024 5-year
- Hispanic / Latino
- 10.5%2024 5-year
- Peak Democratic margin
- D+29.1 in 1964MIT Election Lab
- Peak Republican margin
- R+47.8 in 1928MIT Election Lab
- Most similar
- State House District 140, PA · twin score 85.4
presidential history
Party record book
Pennsylvania 18th State House 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
64.3%
7,074 votes · D+29.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 57.3%
Republican
Herbert Hoover1928
73.4%
2,209 votes · R+47.8 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 64.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
17,207votes
52.1% of the vote · D+5.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 16,170 votes
Republican
Donald Trump2024
16,983votes
51.1% of the vote · R+3.3 · modeled estimate
Runner-up · Donald Trump, 2020 · 15,512 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
John Kerry2004
+13.1pts D vs U.S.
Place D+10.6 · U.S. R+2.5 · modeled estimate
Runner-up · Al Gore, 2000 · +11.4 pts
Republican
Herbert Hoover1932
+31.7pts R vs U.S.
Place R+13.9 · U.S. D+17.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +30.3 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
In 2024 it voted Republican by R+3.2, against D+16.3 in 2008, having changed party at least once across the five cycles. Median household income was $112,426 in the 2024 ACS 5-year, among the higher figures for a state house district.
Across the recorded series it reached a Democratic high of 29.1 points in 1964 and a Republican high of 47.8 points in 1928. Between 2020 and 2024 the district moved 8.4 points toward the Republican candidate; the 2024 margin was 3.3 points.
A population of 63,689, a 64% non-Hispanic-white share, and a median household income of $85,550 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 140 and State House District 141.
The state-house 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 18th State House District. Akashic. https://akashic.app/sld-lower/42018/. Accessed May 20, 2026. License: CC BY 4.0.