Pennsylvania District 12

45 Middle of the pack

Less compact than 45% of other congressional districts.

236th least compact of 429 nationally, 7th of 17 in Pennsylvania.

A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work

The three measures

Polsby-Popper: 0.19at least as compact as 32% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
Reock: 0.62at least as compact as 82% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
Convex hull: 0.78at least as compact as 51% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.

Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.

Cities and towns

The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.

Pittsburgh city302,949 of its 302,971 residents
Bethel Park municipalityall 33,577 residents
Monroeville municipalityall 28,640 residents
Plum boroughall 27,144 residents
Baldwin boroughall 21,510 residents
Murrysville municipalityall 21,006 residents
West Mifflin boroughall 19,589 residents
McKeesport cityall 17,727 residents
Whitehall boroughall 15,064 residents
Jefferson Hills boroughall 12,424 residents

And 52 smaller places. 17% of this district's people live outside any city, town or named community. How places are counted

ZIP codes

96 ZIP codes have residents in this district. 36 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.

Show all 96 ZIP codes

15017 (28%)
15018
15020
15025
15028
15034
15035
15037
15045
15047
15063 (13%)
15068 (12%)
15083
15085
15088
15089 (18%)
15102 (99%)
15104
15106 (2%)
15110
15112
15120
15122
15123
15129 (99%)
15131
15132
15133
15135
15136 (1%)
15137
15139 (1%)
15140
15145 (98%)
15146
15147 (8%)
15148
15201
15203
15204 (99%)
15205 (32%)
15206 (99%)
15207
15208 (99%)
15210
15211
15212 (92%)
15213
15214 (76%)
15216 (37%)
15217
15218 (54%)
15219
15220 (40%)
15221 (22%)
15222
15224
15226 (92%)
15227
15228 (2%)
15232
15233
15234 (18%)
15235 (10%)
15236
15239
15241 (99%)
15243 (4%)
15260
15282
15332 (19%)
15601 (2%)
15611
15615
15617
15623
15625
15626 (28%)
15632 (82%)
15636
15637
15640
15642
15644 (88%)
15647
15660
15663
15665
15668 (98%)
15672 (23%)
15675
15678
15679 (11%)
15691
15692
15698 (94%)

These are the Census Bureau's ZIP code areas, which match residential ZIP codes closely. ZIP codes used only for PO boxes or a single organization aren't included. How ZIP codes are matched

2024 presidential vote

Kamala Harris 59.7%, Donald Trump 40.3%

Shares of the votes for the two of them; other candidates are left out. Pennsylvania used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from

U.S. House

Summer Lee, Democrat

Elected November 3, 2026, takes office January 3, 2027.

Unofficial results from the Pennsylvania Department of State, checked November 6, 2026. A race shows a winner once news decision desks have called it. Results become official when the state certifies them. Where this comes from

Pennsylvania's senators

John Fetterman, Democrat
David McCormick, Republican

Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from

Where it sits in Pennsylvania

Very compact (0 to 19)
Compact (20 to 39)
Middle (40 to 59)
Irregular (60 to 79)
Very irregular (80 to 100)

Spot a problem with this district? Email us about PA-12.