California

Redistricting Algorithm

✱Redistricting was done, keep in mind that this state is notoriously hard to programmatically redistrict due to geographical distortion and/or data inconsistency in the census

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

0.36

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

0.21

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

-5.27

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

10.98

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

-1.35

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.40
  • African American: 0.40
  • East & South Asian: 0.34
  • Native American: 0.25
  • Other: 0.24

FairyMandered Districts Scores

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

0.37

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

0.16

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

-1.28

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

16.88

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

0.61

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.27
  • African American: 0.48
  • East & South Asian: 0.35
  • Native American: 0.10
  • Other: 0.22

California Redistricting Laws After 2020 Census

  • California voted 14-0 in favor of a new congressional district map on December 20, 2021.
  • California voted 14-0 in favor of a new state Assembly and Senate district maps on December 20, 2021.
  • California has 52 United States representatives and 120 state legislators.
click here to learn more about california's redistricting laws

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