Pennsylvania 21st 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
65.8%
24,964 votes · D+32.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 64.5%
Republican
Theodore Roosevelt1904
73.5%
4,776 votes · R+55.9 · modeled estimate
Runner-up · William McKinley, 1896 · 70.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
24,964votes
65.8% of the vote · D+32.2 · modeled estimate
Runner-up · Kamala Harris, 2024 · 24,241 votes
Republican
Dwight D. Eisenhower1956
20,282votes
54.9% of the vote · R+10.0 · modeled estimate
Runner-up · Richard Nixon, 1972 · 19,586 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
Walter Mondale1984
+31.2pts D vs U.S.
Place D+13.0 · U.S. R+18.2 · modeled estimate
Runner-up · Michael Dukakis, 1988 · +27.3 pts
Republican
William McKinley1896
+37.4pts R vs U.S.
Place R+43.5 · U.S. R+6.1 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · +36.3 pts
current representation
Current officeholders
DLindsay PowellState House · 21
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 1 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
D
58.9%20,751
41.1%14,482
35,233
Pennsylvania 21st State House District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 33.5 points in 1936 and a Republican high of 55.9 points in 1904. The 2024 margin was 23.2 points.
A population of 62,006, a 87% non-Hispanic-white share, and a median household income of $85,852 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 20 and State House District 27.
Akashic
Political twins — state-house districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Pennsylvania 21st State House District. Akashic. https://akashic.app/sld-lower/42021/. Accessed May 20, 2026. License: CC BY 4.0.
How did Pennsylvania 21st State House District vote in 2024?
In 2024, Pennsylvania 21st State House District voted Democratic by 23.2 points (D+23.2), carried by the Democratic candidate. Out of 39,777 votes cast, 24,241 went Democratic and 15,006 went Republican.
When did Pennsylvania 21st State House District last vote Republican?
The most recent presidential election in which Pennsylvania 21st State House District voted Republican was 1972.
How many people live in Pennsylvania 21st State House District?
Pennsylvania 21st State House District has a population of 62,006 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Pennsylvania 21st State House District?
Median household income in Pennsylvania 21st State House District is $85,852 — above the national median of $80,734. The Pennsylvania state median is $77,971.
What is the political history of Pennsylvania 21st State House District?
Akashic tracks 38 presidential elections in Pennsylvania 21st State House District from 1876 to 2024. Of those, 22 went Democratic and 15 went Republican.