state senate districtPennsylvania 12th State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+2.4
2008D+11.8
2012D+5.2
2016D+14.1
2020D+19.6
2024D+15.9
net swing · 2004→2024D+13.6D+2.4 → D+15.9
vs. U.S. · 2024D+17.4D+15.9 vs R+1.5
presidential returns
2024 turnout 84.1% of 196,384 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
94,857
68,571
1,762
165,190
196,384
84.1%
2020
95,859
64,196
1,653
161,708
186,446†
86.7%
2016
76,099
56,659
5,155
137,913
182,966†
75.4%
2012
67,055
60,405
1,604
129,064
177,775†
72.6%
2008
73,525
57,822
1,208
132,555
172,973†
76.6%
2004
64,419
61,428
840
126,687
168,170†
75.3%
† 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
Boundary 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 SD 12PennsylvaniaUnited States
Irish19.9%14.8%9.4%
German19.7%21.6%12.5%
Italian14.1%10.6%4.8%
English9.6%8.3%9.5%
Polish5.8%5.4%2.2%
American4.1%4.4%5.3%
Russian2.1%——
Scottish1.7%1.1%1.3%
Asian Indian4.1%1.2%1.4%
Chinese2.3%0.9%1.3%
Korean1.8%0.2%0.4%
Vietnamese0.8%0.3%0.6%
Filipino0.6%0.2%0.9%
Bangladeshi0.3%——
African American†4.5%8.7%9.9%
Jamaican0.3%0.3%0.4%
African0.2%0.4%0.5%
Haitian0.2%0.2%0.3%
Mexican1.6%1.4%11.3%
Puerto Rican1.5%3.7%1.8%
Cuban0.2%0.2%0.7%
Dominican0.2%1.4%0.7%
Colombian0.2%0.2%0.4%
Honduran0.2%—0.3%
Salvadoran0.2%—0.7%
Spanish0.2%——
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 SD 12
Pennsylvania
United States
Median age
41.7
41.2
39.1
Age 18–24
7.9%
8.9%
9.2%
Age 65 and older
18.7%
19.5%
17.2%
Household economy
Measure
PA SD 12
Pennsylvania
United States
Median household income
$119,128
$77,971
$84,427
Poverty rate
4.8%
11.7%
12.5%
Bachelor's degree or higher (25+)
53.0%
35.2%
35.6%
Languages at home
Measure
PA SD 12
Pennsylvania
United States
Speaks a non-English language at home
14.7%
12.4%
22.3%
Spanish
4.1%
5.6%
13.6%
Other Indo-European
3.0%
1.7%
2.0%
Chinese (incl. Mandarin & Cantonese)
1.4%
0.8%
1.1%
Other Asian & Pacific Island
1.2%
0.7%
1.1%
Religious landscape
Measure
PA SD 12
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 12th State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+2.4%
2008
+11.8%
2012
+5.2%
2016
+14.1%
2020
+19.6%
2024
+15.9%
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.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
57.4%Harris94,857
41.5%Trump68,571
1.1%
D+15.9
R+3.7
D+17.4
165,190
D
59.3%Biden95,859
39.7%Trump64,196
1.0%
D+19.6
D+5.5
D+15.1
161,708
D
55.2%Clinton76,099
41.1%Trump56,659
3.7%
D+14.1
D+8.9
D+12.0
137,913
D
52.0%Obama67,055
46.8%Romney60,405
1.2%
D+5.2
R+6.7
D+1.3
129,064
D
55.5%Obama73,525
43.6%McCain57,822
0.9%
D+11.8
D+9.5
D+4.6
132,555
D
50.8%Kerry64,419
48.5%Bush61,428
0.7%
D+2.4
—
D+4.8
126,687
current representation
Current officeholders
DMaria CollettState Senate · 12
State legislative officeholder from OpenStates nightly current-legislator data.
Covering a stretch of the state where Republican presidential candidates have run well above statewide averages, this district's R+18.4 margin in 2024 places it firmly outside competitive territory in most statewide cycles.
Across the recorded series it reached a Democratic high of 19.6 points in 2020. Between 2020 and 2024 the district moved 3.7 points toward the Republican candidate; the 2024 margin was 15.9 points.
A population of 263,546, a 75% non-Hispanic-white share, and a median household income of $119,128 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 44.
Akashic
Political twins — state-senate districts
The state-senate 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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Pennsylvania 12th State Senate District. Akashic. https://akashic.app/sld-upper/42012/. Accessed May 20, 2026. License: CC BY 4.0.
How did Pennsylvania 12th State Senate District vote in 2024?
In 2024, Pennsylvania 12th State Senate District voted Democratic by 15.9 points (D+15.9), carried by the Democratic candidate. Out of 165,190 votes cast, 94,857 went Democratic and 68,571 went Republican.
How many people live in Pennsylvania 12th State Senate District?
Pennsylvania 12th State Senate District has a population of 263,546 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Pennsylvania 12th State Senate District?
Median household income in Pennsylvania 12th State Senate District is $119,128 — above the national median of $80,734. The Pennsylvania state median is $77,971.
What is the political history of Pennsylvania 12th State Senate District?
Akashic tracks 6 presidential elections in Pennsylvania 12th State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
