Pennsylvania

Redistricting Algorithm

Current Congressional Districts

FairyMandered Districts

Demographic Distribution For Current Congressional Districts

FYI: % Based on Registered Voter

Demographic Distribution For FairyMandered Districts




FYI: % Based on Registered Voter

Fairness Metrics

Current Congressional Districts Scores

☞ Reock Score ⓘ Measurement of compactness for each district that ranges from 0 to 1

0.46

☞ Polsby Popper ⓘ Measurement of compactness between a district's area and the square of its perimeter

0.32

☞ Efficiency Gap ⓘ Measurement of competitiveness where wasted votes in an election quantify the degree of partisanship

-4.19

☞ Lopsided Margin ⓘ Measurement which calculates difference between the average percentages by which each part won in a district

0.34

☞ Mean-Median ⓘ Difference between the median and mean vote-share across all districts for one party

0.97

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.37
  • African American: 0.44
  • East & South Asian: 0.34
  • Native American: 0.09
  • Other: 0.10

FairyMandered Districts Scores

☞ Reock Score ⓘ Measurement of compactness for each district that ranges from 0 to 1

0.47

☞ Polsby Popper ⓘ Measurement of compactness between a district's area and the square of its perimeter

0.22

☞ Efficiency Gap ⓘ Measurement of competitiveness where wasted votes in an election quantify the degree of partisanship

3.49

☞ Lopsided Margin ⓘ Measurement which calculates difference between the average percentages by which each part won in a district

5.45

☞ Mean-Median ⓘ Difference between the median and mean vote-share across all districts for one party

3.20

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.35
  • African American: 0.59
  • East & South Asian: 0.31
  • Native American: 0.13
  • Other: 0.17

Pennsylvania Redistricting Laws After 2020 Census

  • Pennsylvania Supreme Court ruled to enact a new congressional map on February 23rd, 2022
  • Pennsylvania Legislative Reapportionment Commission voted 4-1 to approve new state House and Senate maps on February 4th, 2022
  • Pennsylvania has 17 United States representatives and 253 state legislators.
click here to learn more about Pennsylvania's redistricting laws

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