State Senate District 21 State Senate District (PA) — Elections 1876–2024

Pennsylvania 21st State Senate District, Pennsylvania: Republican loyalist district. In 2024, voted R+34%. Republican peak: R+52 in 1928.

Key facts

2024 presidential margin: R+34MIT Election Lab
Political archetype: Republican loyalistAkashic typology
Population: 319,8602024 5-year
Median household income: $75,8372024 5-year
White (non-Hispanic): 92.2%2024 5-year
Black: 1.9%2024 5-year
Hispanic / Latino: 2.0%2024 5-year
Peak Democratic margin: D+23 in 1964MIT Election Lab
Peak Republican margin: R+52 in 1928MIT Election Lab

2024 results by constituent county

6 counties · 0 D · 6 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	R	−34.5%	59,093	122,413	183,610
2020	R	−34.3%	56,518	116,870	175,751
2016	R	−36.2%	45,493	101,542	154,952
2012	R	−27.2%	50,966	89,910	143,438
2008	R	−18.7%	59,444	87,301	148,752
2004	R	−23.0%	55,434	88,844	145,124
2000	R	−19.5%	48,528	73,028	125,363
1996	R	−6.5%	46,073	53,476	114,252
1992	R	−0.2%	45,483	45,665	119,524
1988	R	−11.2%	45,524	57,164	103,748
1984	R	−17.5%	47,030	67,106	114,718
1980	R	−17.6%	40,314	59,167	107,150
1976	R	−8.6%	47,630	56,763	106,569
1972	R	−33.3%	32,357	65,813	100,420
1968	R	−10.6%	41,667	52,416	101,233
1964	D	+22.5%	63,642	40,197	104,164
1960	R	−25.6%	40,775	68,909	109,960
1956	R	−38.3%	30,154	67,684	98,000
1952	R	−32.7%	32,764	64,900	98,331
1948	R	−27.7%	25,722	45,996	73,067
1944	R	−27.1%	30,171	52,951	83,909
1940	R	−26.0%	34,666	59,128	94,132
1936	R	−10.0%	43,640	53,618	100,192
1932	R	−15.6%	27,714	38,452	68,822
1928	R	−52.5%	18,437	59,719	78,700
1924	R	−48.6%	11,153	39,053	57,463
1920	R	−38.3%	12,484	31,609	49,975
1916	R	−2.4%	14,968	15,833	35,690
1912	O	+15.9%	11,497	5,908	35,175
1908	R	−18.3%	13,132	20,036	37,825
1904	R	−35.5%	8,962	21,516	35,372
1900	R	−17.8%	15,076	22,178	39,979
1896	R	−9.0%	17,656	21,294	40,551
1892	R	−5.4%	14,585	16,408	33,876
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

30.5%

Irish

16.8%

English

10.7%

Italian

9.4%

Polish

6.2%

American

4.7%

Scottish

2.0%

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: 44.1 in this county, 39.1 nationally

Male

Age

Female

0.9%

85+

1.5%

2.9%

75–84

3.5%

6.4%

65–74

6.6%

7.6%

55–64

7.5%

6.3%

45–54

6.0%

6.2%

35–44

5.8%

5.9%

25–34

5.3%

4.4%

18–24

4.3%

7.4%

5–17

6.9%

2.4%

2.3%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$75,837

State Senate District 21 ranks near the middle of US counties.

State Senate District 21$75,837

Pennsylvania$77,971

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

10.4%

Child poverty is below the national average.

Children under 1812.2%

Working age (18–64)10.0%

Seniors (65+)11.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

96.4%

speak English only

Other Indo-European1.7%

Spanish1.1%

Asian & Pacific Islander0.6%

Other languages0.2%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

20.9%

Other Christian

10.0%

Methodist

7.8%

Mainline Protestant

6.4%

Pentecostal & Holiness

2.0%

Baptist

0.6%

Non-Christian

0.1%

Source · 2020 US Religion Census. Remaining 52.1% of residents not counted as adherents by any reporting body.

Stretching across rural south-central Pennsylvania, this district delivered a nearly 40-point Republican presidential margin in 2024, reflecting the demographic and economic profile common to small-town and agricultural communities in the region.

The Republican margin in Pennsylvania 21st State Senate District reached its widest at fifty-two points in 1928. The margin in 2024 was thirty-four points, in line with the district's deep historical pattern.

Its loyalty is rooted in its place. Median household income of $75,837, a 92% non-Hispanic-white share, and a population of 319,860 together describe a district whose political habits are deeply settled.

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Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

State Senate District 21, Pennsylvania. Akashic. https://akashic.app/sld-upper/42021/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did State Senate District 21, Pennsylvania vote in 2024?

In 2024, State Senate District 21, Pennsylvania voted Republican by 34.5 points (R+34), carried by the Republican candidate. Out of 183,610 votes cast, 59,093 went Democratic and 122,413 went Republican.

What is State Senate District 21, Pennsylvania's political archetype?

Akashic classifies State Senate District 21, Pennsylvania as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 1 times, Republican 32 times, and other 1 times.

When did State Senate District 21, Pennsylvania last vote Democratic?

The most recent presidential election in which State Senate District 21, Pennsylvania voted Democratic was 1964.

How many people live in State Senate District 21, Pennsylvania?

State Senate District 21, Pennsylvania has a population of 319,860 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in State Senate District 21, Pennsylvania?

Median household income in State Senate District 21, Pennsylvania is $75,837 — below the national median of $80,734. The Pennsylvania state median is $77,971.

What is the political history of State Senate District 21, Pennsylvania?

Akashic tracks 38 presidential elections in State Senate District 21, Pennsylvania from 1876 to 2024. Of those, 1 went Democratic and 32 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.

Pennsylvania 21st State Senate District has voted Republican in fifteen straight presidential cycles.

Key facts

Demographics

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Frequently asked questions