Overview
- District ID
- pa-sd-042
- State
- Pennsylvania
- Chamber
- Upper chamber (state senate)
- District Code
- 042
- Land Area
- 56.8 sq mi
- Water Area
- 3.29 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 |
|---|
| Allegheny County | 56.78 sq mi | 100.0% | 7.8% |
Showing all 1 county
Places
Showing all 12 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 17 | 128,835 | 51.5% | 16.8% | 55.1% |
| PA District 12 | 121,167 | 48.5% | 15.8% | 44.9% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 179,601
- Active Voters
- 166,859 (92.9%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 108,026 | 60.1% |
| Republican | 40,692 | 22.7% |
| Unaffiliated | 25,373 | 14.1% |
| Other parties | 5,482 | 3.1% |
| No party recorded | 28 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 80,862 (45.0%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 135,908 (75.7%) | 34,814 (19.4%) | 9,161 (5.1%) |
| 2021–2022 | 104,317 (58.1%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 119,261 (66.4%) | 43,165 (24.0%) | 9,556 (5.3%) |
| 2017–2018 | 86,540 (48.2%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 93,182 (51.9%) | 37,734 (21.0%) | 12,997 (7.2%) |
| 2013–2014 | 50,056 (27.9%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 75,937 (42.3%) | 14,334 (8.0%) | 6,065 (3.4%) |
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
- 248,399 (± 2,476)
- Median Age
- 38.8
- Median Household Income
- $74,154 (± $1,692)
- High School Graduate or Higher (age 25+)
- 94.9%
- Bachelor's Degree or Higher (age 25+)
- 44.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 41,950 | 16.9% |
| 18 to 64 | 160,586 | 64.6% |
| 65 and over | 45,863 | 18.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 7,606 | 3.1% |
| White, not Hispanic | 183,434 | 73.8% |
| Black, not Hispanic | 34,941 | 14.1% |
| Asian, not Hispanic | 8,918 | 3.6% |
| American Indian / Alaska Native, not Hispanic | 231 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 39 | 0.0% |
| Some other race, not Hispanic | 1,524 | 0.6% |
| Two or more races, not Hispanic | 11,706 | 4.7% |
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
- 239,088
- Citizen Voting Age Population (CVAP)
- 198,284
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 232,814 | 97.4% |
| Hispanic | 6,280 | 2.6% |
| White | 184,466 | 77.2% |
| Black | 34,679 | 14.5% |
| Asian | 4,817 | 2.0% |
| American Indian / Alaska Native | 230 | 0.1% |
| Native Hawaiian / Pacific Islander | 38 | 0.0% |
| Two or More Races | 828 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 193,684 | 97.7% |
| Hispanic | 4,603 | 2.3% |
| White | 159,727 | 80.6% |
| Black | 28,290 | 14.3% |
| Asian | 4,496 | 2.3% |
| American Indian / Alaska Native | 1,036 | 0.5% |
| Native Hawaiian / Pacific Islander | 28 | 0.0% |
| Two or More Races | 387 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
