congressional districtPennsylvania 1st Congressional District
presidential margin
2004–2024 · Democratic minus Republican
2004D+1.9
2008D+8.2
2012D+0.8
2016D+0.7
2020D+4.6
2024D+0.3
net swing · 2004→2024R+1.5D+1.9 → D+0.3
vs. U.S. · 2024D+1.8D+0.3 vs R+1.5
presidential returns
2024 turnout 80.7% of 587,463 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
234,918
233,451
5,925
474,294
587,463
80.7%
2020
241,313
219,721
4,905
465,939
565,548†
82.4%
2016
195,013
192,201
15,255
402,469
556,250†
72.4%
2012
186,447
183,542
4,832
374,821
545,023†
68.8%
2008
207,582
175,762
4,544
387,888
535,043†
72.5%
2004
188,435
181,541
2,173
372,149
525,063†
70.9%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
District by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupPA-1PennsylvaniaUnited States
Irish22.2%14.8%9.4%
German20.5%21.6%12.5%
Italian14.2%10.6%4.8%
English10.2%8.3%9.5%
Polish6.5%5.4%2.2%
American4.7%4.4%5.3%
Russian2.2%——
Ukrainian1.7%——
Asian Indian2.9%1.2%1.4%
Chinese1.1%0.9%1.3%
Korean0.7%0.2%0.4%
Vietnamese0.3%0.3%0.6%
Filipino0.3%0.2%0.9%
Pakistani0.2%——
Puerto Rican1.9%3.7%1.8%
Mexican1.5%1.4%11.3%
Dominican0.4%1.4%0.7%
Colombian0.3%0.2%0.4%
Guatemalan0.3%0.2%0.5%
Cuban0.2%0.2%0.7%
Salvadoran0.2%—0.7%
Ecuadorian0.2%——
African American†3.1%8.7%9.9%
Jamaican0.3%0.3%0.4%
African0.2%0.4%0.5%
Haitian0.2%0.2%0.3%
Liberian0.2%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
PA-1
Pennsylvania
United States
Median age
43.8
41.2
39.1
Age 18–24
7.8%
8.9%
9.2%
Age 65 and older
20.1%
19.5%
17.2%
Household economy
Measure
PA-1
Pennsylvania
United States
Median household income
$113,911
$77,971
$84,427
Poverty rate
5.9%
11.7%
12.5%
Bachelor's degree or higher (25+)
46.5%
35.2%
35.6%
Languages at home
Measure
PA-1
Pennsylvania
United States
Speaks a non-English language at home
13.7%
12.4%
22.3%
Spanish
4.1%
5.6%
13.6%
Russian, Polish, or other Slavic
2.6%
0.8%
0.7%
Other Indo-European
2.8%
1.7%
2.0%
Other Asian & Pacific Island
1.0%
0.7%
1.1%
Religious landscape
Measure
PA-1
Pennsylvania
United States
Catholic
—
21.9%
18.6%
Evangelical Protestant
—
9.3%
16.5%
Unclaimed / not counted
—
53.1%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Pennsylvania 1st Congressional District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+1.9%
2008
+8.2%
2012
+0.8%
2016
+0.7%
2020
+4.6%
2024
+0.3%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Federal officeholders only. State and local officeholders are planned for the next data pass.
Congressional elections · 25 House races · 17 Senate races
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Source · MIT Election Lab (MEDSL), House. CC-BY 4.0.
Year
District
Won
Democratic
Republican
Total
2024
1
R
43.6%202,042
56.4%261,390
463,432
2022
1
R
45.1%165,809
54.9%201,571
367,380
2020
1
R
43.4%191,875
56.6%249,804
441,679
2018
1
R
48.7%160,745
51.3%169,053
329,798
2016
1
D
82.2%245,791
17.8%53,219
299,010
2014
1
D
82.8%131,248
17.2%27,193
158,441
2012
1
D
84.9%235,394
15.1%41,708
277,102
2010
1
D
100.0%149,944
0.0%0
149,944
2008
1
D
90.8%242,799
9.2%24,714
267,513
2006
1
D
100.0%137,987
0.0%0
137,999
2004
1
D
86.3%214,462
13.4%33,266
248,585
2002
1
D
86.4%121,076
12.5%17,444
140,090
2000
1
D
88.3%149,621
11.7%19,920
169,541
1998
1
D
81.2%77,788
16.6%15,898
95,848
1996
1
D
87.5%145,210
12.5%20,734
165,945
1994
1
D
81.5%99,669
18.5%22,595
122,264
1992
1
D
80.9%150,172
19.1%35,419
185,591
1990
1
D
79.4%73,423
20.6%19,018
92,441
1988
1
D
76.3%128,076
23.7%39,749
167,825
1986
1
D
74.7%88,224
25.3%29,811
118,035
1984
1
D
74.9%148,123
25.1%49,559
197,682
1982
1
D
72.3%103,626
26.6%38,155
143,416
1980
1
D
71.9%111,693
24.4%37,893
155,451
1978
1
D
71.9%104,412
26.1%37,913
145,162
1976
1
D
73.5%117,087
25.2%40,191
159,205
U.S. Senate
The statewide Senate race, counted in this district — aggregated from the precinct-level returns that fall inside its boundaries (not a statewide figure).
Votes · MIT Election Lab (MEDSL) precinct returns (CC BY 4.0); aggregated to the district over VEST precinct geometry (CC BY-NC 4.0).
Year
Won
Democratic
Republican
Total
2024
D
49.3%232,470
48.4%228,079
471,431
2022
D
51.2%2,751,012
46.3%2,487,260
5,368,021
2018
D
55.6%2,777,680
42.7%2,134,848
4,994,643
2016
R
47.3%2,865,012
48.8%2,951,702
6,051,856
2012
D
53.7%3,021,364
44.6%2,509,132
5,627,422
2010
R
49.0%1,948,716
51.0%2,028,945
3,977,661
2006
D
58.7%2,392,984
41.3%1,684,778
4,077,762
2004
R
42.0%2,334,126
52.6%2,925,080
5,558,525
2000
R
45.5%2,154,908
52.4%2,481,962
4,735,116
1998
R
34.8%1,028,839
61.3%1,814,180
2,957,499
1994
R
46.9%1,648,481
49.4%1,735,691
3,513,112
1992
R
46.3%2,224,966
49.1%2,358,125
4,802,410
1988
R
32.4%1,416,764
66.5%2,901,715
4,366,598
1986
R
42.9%1,448,219
56.4%1,906,537
3,378,226
1982
R
39.2%1,412,965
59.3%2,136,418
3,604,108
1980
R
48.0%2,122,391
50.5%2,230,404
4,418,042
1976
R
46.8%2,126,977
52.4%2,381,891
4,546,353
2024 U.S. Senate — every candidate counted in this district
Robert Casey · Democrat49.3%232,470
Dave McCormick · Republican48.4%228,079
John C Thomas · Libertarian1.2%5,449
Leila L Hazou · Green0.9%4,157
Bernard Selker · Constitution0.3%1,276
Pennsylvania's 1st, anchored in Bucks County north of Philadelphia, has shifted from reliably Republican to a genuine battleground, with the 2024 presidential race settling at just 1.4 points Democratic — a margin that keeps both parties investing heavily here.
Across the recorded series it reached a Democratic high of 8.2 points in 2008. Between 2020 and 2024 the district moved 4.3 points toward the Republican candidate; the 2024 margin was 0.3 points.
A population of 764,318, a 80% non-Hispanic-white share, and a median household income of $113,911 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 7 and Congressional District 4.
Akashic
Political twins — districts
The congressional 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 →
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Pennsylvania 1st Congressional District. Akashic. https://akashic.app/cd/4201/. Accessed May 20, 2026. License: CC BY 4.0.
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How did Pennsylvania 1st Congressional District vote in 2024?
In 2024, Pennsylvania 1st Congressional District voted a near-tie (D+0.3), carried by the Democratic candidate. Out of 474,294 votes cast, 234,918 went Democratic and 233,451 went Republican.
How many people live in Pennsylvania 1st Congressional District?
Pennsylvania 1st Congressional District has a population of 764,318 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Pennsylvania 1st Congressional District?
Median household income in Pennsylvania 1st Congressional District is $113,911 — above the national median of $80,734. The Pennsylvania state median is $77,971.
What is the political history of Pennsylvania 1st Congressional District?
Akashic tracks 6 presidential elections in Pennsylvania 1st Congressional District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
