State House District 166 State House District (PA) — Elections 1876–2024

Pennsylvania 166th State House District, Pennsylvania: Democratic loyalist district. In 2024, voted D+24%. Republican peak: R+69 in 1924.

Key facts

2024 presidential margin: D+24MIT Election Lab
Political archetype: Democratic loyalistAkashic typology
Population: 40,8592024 5-year
Median household income: $89,5462024 5-year
White (non-Hispanic): 63.2%2024 5-year
Black: 22.2%2024 5-year
Hispanic / Latino: 5.0%2024 5-year
Peak Democratic margin: D+27 in 2020MIT Election Lab
Peak Republican margin: R+69 in 1924MIT Election Lab

2024 results by constituent county

1 counties · 1 D · 0 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	D	+23.7%	14,202	8,706	23,223
2020	D	+26.8%	14,561	8,361	23,133
2016	D	+22.3%	12,514	7,807	21,116
2012	D	+21.3%	12,118	7,820	20,144
2008	D	+21.4%	12,618	8,132	20,951
2004	D	+14.8%	11,470	8,495	20,072
2000	D	+11.7%	9,513	7,466	17,500
1996	D	+9.9%	8,179	6,534	16,559
1992	D	+1.0%	7,845	7,660	18,769
1988	R	−20.9%	6,782	10,416	17,375
1984	R	−24.3%	6,928	11,410	18,466
1980	R	−21.4%	6,230	10,107	18,119
1976	R	−11.6%	8,271	10,488	19,109
1972	R	−29.6%	6,641	12,374	19,360
1968	R	−10.2%	7,526	9,437	18,795
1964	D	+13.9%	10,383	7,843	18,277
1960	R	−4.2%	8,792	9,570	18,396
1956	R	−27.2%	5,786	10,134	15,957
1952	R	−23.4%	5,666	9,152	14,866
1948	R	−23.6%	4,032	6,589	10,815
1944	R	−10.1%	4,516	5,540	10,109
1940	R	−14.1%	4,248	5,654	9,942
1936	R	−6.8%	4,593	5,283	10,088
1932	R	−38.8%	2,286	5,311	7,788
1928	R	−47.6%	2,072	5,861	7,967
1924	R	−69.4%	449	2,963	3,622
1920	R	−54.1%	677	2,407	3,195
1916	R	−34.7%	546	1,151	1,745
1912	O	−10.4%	423	594	1,639
1908	R	−44.1%	404	1,071	1,514
1904	R	−59.5%	253	1,060	1,357
1900	R	−51.8%	300	973	1,298
1896	R	−52.8%	294	986	1,310
1892	R	−24.6%	389	654	1,077
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.

Irish

22.2%

Italian

14.4%

German

11.8%

English

7.7%

Polish

3.5%

American

2.7%

Scottish

1.4%

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: 39.1 in this county, 39.1 nationally

Male

Age

Female

0.7%

85+

1.5%

2.1%

75–84

2.8%

4.8%

65–74

5.6%

6.3%

55–64

6.9%

5.8%

45–54

6.0%

6.4%

35–44

6.7%

6.2%

25–34

6.5%

4.9%

18–24

4.9%

8.4%

5–17

8.0%

2.9%

2.8%

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

Median household income

2024 inflation-adjusted dollars

$89,546

State House District 166 ranks near the middle of US counties.

State House District 166$89,546

Pennsylvania$77,971

United States$80,734

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

Poverty rate

All persons below federal poverty line

10.2%

Child poverty is below the national average.

Children under 1813.2%

Working age (18–64)9.2%

Seniors (65+)10.5%

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

Language at home

Population aged 5 and older

86.5%

speak English only

Other Indo-European4.7%

Asian & Pacific Islander3.9%

Spanish3.0%

Other languages1.9%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

33.6%

Other Christian

4.4%

Mainline Protestant

4.4%

Non-Christian

3.4%

Methodist

2.2%

Baptist

1.4%

Pentecostal & Holiness

0.6%

Source · 2020 US Religion Census. Remaining 50.0% of residents not counted as adherents by any reporting body.

With a 2024 presidential margin of D+23.9, District 166 ranks among Pennsylvania's more reliably one-sided legislative seats, reflecting the dense urban or inner-suburban demographics typical of the Philadelphia region.

The Democratic margin in Pennsylvania 166th State House District reached its widest at twenty-seven points in 2020. The margin in 2024 was twenty-four points — still decisive.

Its loyalty is rooted in its place. Median household income of $89,546, a 63% non-Hispanic-white share, and a population of 40,859 together describe a district whose political habits are deeply settled.

Compare two places, side by side

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Cite this page

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

State House District 166, Pennsylvania. Akashic. https://akashic.app/sld-lower/42166/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did State House District 166, Pennsylvania vote in 2024?

In 2024, State House District 166, Pennsylvania voted Democratic by 23.7 points (D+24), carried by the Democratic candidate. Out of 23,223 votes cast, 14,202 went Democratic and 8,706 went Republican.

What is State House District 166, Pennsylvania's political archetype?

Akashic classifies State House District 166, 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 10 times, Republican 23 times, and other 1 times.

When did State House District 166, Pennsylvania last vote Republican?

The most recent presidential election in which State House District 166, Pennsylvania voted Republican was 1988.

How many people live in State House District 166, Pennsylvania?

State House District 166, Pennsylvania has a population of 40,859 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 166, Pennsylvania?

Median household income in State House District 166, Pennsylvania is $89,546 — above the national median of $80,734. The Pennsylvania state median is $77,971.

What is the political history of State House District 166, Pennsylvania?

Akashic tracks 38 presidential elections in State House District 166, Pennsylvania from 1876 to 2024. Of those, 10 went Democratic and 23 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.

Pennsylvania 166th State House District has voted Democratic in nine straight presidential cycles.

Key facts

Demographics

Compare two places, side by side

Frequently asked questions