Overview
- District ID
- pa-sd-012
- State
- Pennsylvania
- Chamber
- Upper chamber (state senate)
- District Code
- 012
- Land Area
- 146 sq mi
- Water Area
- 0.18 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Montgomery County | 145.95 sq mi | 100.0% | 30.2% |
Showing all 1 county
Places
Showing all 18 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| PA District 4 | 166,639 | 63.2% | 21.8% | 58.7% |
| PA District 1 | 96,907 | 36.8% | 12.7% | 41.3% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 194,319
- Active Voters
- 188,211 (96.9%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 87,659 | 45.1% |
| Republican | 72,283 | 37.2% |
| Unaffiliated | 30,354 | 15.6% |
| Other parties | 3,868 | 2.0% |
| No party recorded | 155 | 0.1% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 97,509 (50.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 161,981 (83.4%) | 26,107 (13.4%) | 18,763 (9.7%) |
| 2021–2022 | 124,169 (63.9%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 138,367 (71.2%) | 35,339 (18.2%) | 20,955 (10.8%) |
| 2017–2018 | 100,406 (51.7%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 105,766 (54.4%) | 27,738 (14.3%) | 28,565 (14.7%) |
| 2013–2014 | 62,658 (32.2%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 86,127 (44.3%) | 6,915 (3.6%) | 10,755 (5.5%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 01/05/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 266,500 (± 165)
- Median Age
- 41.7
- Median Household Income
- $119,128 (± $2,986)
- High School Graduate or Higher (age 25+)
- 95.0%
- Bachelor's Degree or Higher (age 25+)
- 54.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 57,638 | 21.6% |
| 18 to 64 | 156,139 | 58.6% |
| 65 and over | 52,723 | 19.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 15,976 | 6.0% |
| White, not Hispanic | 196,627 | 73.8% |
| Black, not Hispanic | 13,813 | 5.2% |
| Asian, not Hispanic | 29,403 | 11.0% |
| American Indian / Alaska Native, not Hispanic | 9 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 12 | 0.0% |
| Some other race, not Hispanic | 1,542 | 0.6% |
| Two or more races, not Hispanic | 9,118 | 3.4% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 252,506
- Citizen Voting Age Population (CVAP)
- 196,384
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 240,224 | 95.1% |
| Hispanic | 12,279 | 4.9% |
| White | 197,582 | 78.2% |
| Black | 13,489 | 5.3% |
| Asian | 22,906 | 9.1% |
| American Indian / Alaska Native | 11 | 0.0% |
| Native Hawaiian / Pacific Islander | 15 | 0.0% |
| Two or More Races | 813 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 189,064 | 96.3% |
| Hispanic | 7,321 | 3.7% |
| White | 157,872 | 80.4% |
| Black | 11,906 | 6.1% |
| Asian | 18,321 | 9.3% |
| American Indian / Alaska Native | 587 | 0.3% |
| Native Hawaiian / Pacific Islander | 15 | 0.0% |
| Two or More Races | 503 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
