Pennsylvania State House District 42

State Legislative District Profile (Lower Chamber)

Overview

District ID
pa-hd-042
State
Pennsylvania
Chamber
Lower chamber
District Code
042
Land Area
14 sq mi
Water Area
0 sq mi

Boundary

Boundary of Pennsylvania State House District 42

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Allegheny County13.96 sq mi100.0%1.9%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Castle Shannon borough1.60 sq mi11.4%100.0%
Dormont borough0.76 sq mi5.4%100.0%

Showing all 2 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
PA District 1752,55382.2%6.9%64.0%
PA District 1211,39217.8%1.5%36.0%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
48,770
Active Voters
46,579 (95.5%)

Party Registration

PartyVotersShare
Democratic25,96953.2%
Republican14,74030.2%
Unaffiliated6,97214.3%
Other parties<10—
No party recorded<10—

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202625,056 (51.4%)0 (0.0%)0 (0.0%)
2023–202441,204 (84.5%)9,705 (19.9%)3,899 (8.0%)
2021–202233,736 (69.2%)0 (0.0%)0 (0.0%)
2019–202036,655 (75.2%)12,183 (25.0%)4,393 (9.0%)
2017–201828,494 (58.4%)0 (0.0%)0 (0.0%)
2015–201629,269 (60.0%)10,062 (20.6%)6,445 (13.2%)
2013–201416,840 (34.5%)0 (0.0%)0 (0.0%)
2011–201224,162 (49.5%)3,327 (6.8%)3,341 (6.9%)

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
63,385 (± 788)
Median Age
42.3
Median Household Income
$107,779 (± $4,012)
High School Graduate or Higher (age 25+)
97.6%
Bachelor's Degree or Higher (age 25+)
62.2%

Population by Age

GroupPeopleShare
Under 1814,24322.5%
18 to 6436,84958.1%
65 and over12,29319.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)1,6202.6%
White, not Hispanic55,01886.8%
Black, not Hispanic1,1561.8%
Asian, not Hispanic2,5634.0%
American Indian / Alaska Native, not Hispanic180.0%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic4870.8%
Two or more races, not Hispanic2,5234.0%

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
61,610
Citizen Voting Age Population (CVAP)
47,682

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic60,15797.6%
Hispanic1,4562.4%
White55,39489.9%
Black1,0881.8%
Asian1,9073.1%
American Indian / Alaska Native180.0%
Native Hawaiian / Pacific Islander30.0%
Two or More Races1520.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic46,72298.0%
Hispanic9612.0%
White43,61091.5%
Black1,2682.7%
Asian1,6483.5%
American Indian / Alaska Native1040.2%
Native Hawaiian / Pacific Islander00.0%
Two or More Races980.2%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).