Pennsylvania 21st State House District, Pennsylvania: Democratic loyalist district. In 2024, voted D+20%. Republican peak: R+58 in 1904.
Key facts
- 2024 presidential margin
- D+20MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 33,3142024 5-year
- Median household income
- $78,5482024 5-year
- White (non-Hispanic)
- 76.1%2024 5-year
- Black
- 12.5%2024 5-year
- Hispanic / Latino
- 3.0%2024 5-year
- Peak Democratic margin
- D+34 in 1936MIT Election Lab
- Peak Republican margin
- R+58 in 1904MIT Election Lab
Constituent county margins for State House District 21, PAOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 11,567 | 7,630 | 19,474 | ||
| D | 11,544 | 7,596 | 19,365 | ||
| D | 9,891 | 6,981 | 17,682 | ||
| D | 9,489 | 7,050 | 16,784 | ||
| D | 10,040 | 7,328 | 17,527 | ||
| D | 9,926 | 7,316 | 17,367 | ||
| D | 8,878 | 6,332 | 15,672 | ||
| D | 7,654 | 5,490 | 14,492 | ||
| D | 8,717 | 4,925 | 16,525 | ||
| D | 9,385 | 6,219 | 15,771 | ||
| D | 10,024 | 7,660 | 17,912 | ||
| D | 8,003 | 7,314 | 16,719 | ||
| D | 8,834 | 8,156 | 17,431 | ||
| R | 7,601 | 10,002 | 17,987 | ||
| D | 9,818 | 7,124 | 19,205 | ||
| D | 12,786 | 6,503 | 19,364 | ||
| D | 11,528 | 8,636 | 20,198 | ||
| R | 8,502 | 10,357 | 18,888 | ||
| D | 9,980 | 9,665 | 19,724 | ||
| D | 8,779 | 6,814 | 15,995 | ||
| D | 9,435 | 7,028 | 16,528 | ||
| D | 9,899 | 7,084 | 17,063 | ||
| D | 9,863 | 4,741 | 15,126 | ||
| D | 5,108 | 4,098 | 9,659 | ||
| R | 4,325 | 5,801 | 10,203 | ||
| R | 591 | 4,017 | 6,807 | ||
| R | 1,084 | 3,737 | 5,400 | ||
| R | 1,421 | 2,085 | 3,774 | ||
| O | 845 | 641 | 3,400 | ||
| R | 959 | 1,993 | 3,280 | ||
| R | 580 | 2,437 | 3,186 | ||
| R | 735 | 1,931 | 2,761 | ||
| R | 802 | 2,063 | 2,910 | ||
| R | 830 | 1,232 | 2,112 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
22.3%
Irish
16.9%
Italian
14.5%
English
8.4%
Polish
7.6%
American
2.7%
Scottish
1.8%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 40.6 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$78,548
State House District 21 ranks near the middle of US counties.
State House District 21$78,548
Pennsylvania$77,971
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.5%
Child poverty is below the national average.
Children under 1814.9%
Working age (18–64)10.6%
Seniors (65+)11.7%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
91.5%
speak English only
Other Indo-European3.4%
Asian & Pacific Islander2.4%
Spanish1.9%
Other languages0.9%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 39.3% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of R+39.7, this rural district ranks among the state's most one-sided, reflecting the broader realignment of small-town and agricultural communities in central or western Pennsylvania toward consistent Republican supermajorities.
The Democratic margin in Pennsylvania 21st State House District reached its widest at thirty-four points in 1936. The margin in 2024 was twenty points — still decisive.
Its loyalty is rooted in its place. Median household income of $78,548, a 76% non-Hispanic-white share, and a population of 33,314 together describe a district whose political habits are deeply settled.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State House District 21, Pennsylvania. Akashic. https://akashic.app/sld-lower/42021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State House District 21, Pennsylvania vote in 2024?
In 2024, State House District 21, Pennsylvania voted Democratic by 20.2 points (D+20), carried by the Democratic candidate. Out of 19,474 votes cast, 11,567 went Democratic and 7,630 went Republican.
What is State House District 21, Pennsylvania's political archetype?
Akashic classifies State House District 21, Pennsylvania as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 22 times, Republican 11 times, and other 1 times.
When did State House District 21, Pennsylvania last vote Republican?
The most recent presidential election in which State House District 21, Pennsylvania voted Republican was 1972.
How many people live in State House District 21, Pennsylvania?
State House District 21, Pennsylvania has a population of 33,314 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State House District 21, Pennsylvania?
Median household income in State House District 21, Pennsylvania is $78,548 — below the national median of $80,734. The Pennsylvania state median is $77,971.
What is the political history of State House District 21, Pennsylvania?
Akashic tracks 38 presidential elections in State House District 21, Pennsylvania from 1876 to 2024. Of those, 22 went Democratic and 11 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.