Pennsylvania District 1

22 Compact

Less compact than 16% of other congressional districts.

361st least compact of 429 nationally, 14th 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: 0.40at least as compact as 86% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
Reock: 0.53at least as compact as 63% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
Convex hull: 0.88at least as compact as 85% 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.

The state's edge

43% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge

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.

Levittown communityall 52,699 residents
Horsham community13,626 of its 15,193 residents
Montgomeryville communityall 12,998 residents
Croydon communityall 10,014 residents
Bristol boroughall 9,861 residents
Morrisville boroughall 9,809 residents
Quakertown boroughall 9,359 residents
Perkasie boroughall 9,120 residents
Fairless Hills communityall 9,041 residents
Doylestown boroughall 8,300 residents

And 42 smaller places. 66% of this district's people live outside any city, town or named community. How places are counted

ZIP codes

70 ZIP codes have residents in this district. 20 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.

Show all 70 ZIP codes

18036 (15%)
18041 (92%)
18042 (1%)
18054 (78%)
18055 (3%)
18070 (70%)
18073
18074 (3%)
18076
18077 (90%)
18081
18901
18902
18912
18913
18914
18915
18917
18920
18921
18923
18925
18927
18929
18930
18932
18933
18935
18936
18938
18940
18942
18944
18946
18947
18950
18951 (99%)
18954
18955
18960
18962
18964 (99%)
18966
18969 (99%)
18970
18972
18974
18976
18977
18980
19002 (14%)
19006 (7%)
19007
19020
19021
19030
19040 (20%)
19044 (75%)
19047
19053
19054
19055
19056
19057
19067
19438 (7%)
19440 (98%)
19446 (19%)
19454 (63%)
19504 (1%)

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 50.2%, Donald Trump 49.8%

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

Bob Harvie, 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)

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