Iowa

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

0.45

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

0.33

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

40.13

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

cannot calculate - Rep. won every district

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

-2.65

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.16
  • African American: 0.11
  • East & South Asian: 0.13
  • Native American: 0.03
  • Other: 0.04

FairyMandered Districts Scores

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

0.51

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

0.34

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

-26.68

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

-8.11



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

-1.77

☞ Dissimilarity Index ⓘ Measurement of minority representation within a district
  • Hispanic: 0.08
  • African American: 0.22
  • East & South Asian: 0.01
  • Native American: N/A
  • Other: 0.08

Iowa Redistricting Laws After 2020 Census

  • Gov. Kim Reynolds (R) signed new congressional and state legislative maps into law on November 4th, 2021.
  • Iowa has 4 United States representatives and 150 state legislators.
click here to learn more about iowa's redistricting laws

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