Partisan balance of redistricting committees in 2011

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Redistricting in
2011-2012
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Redistricting in the states
AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
See also
Redistricting on Policypedia
State legislative and congressional redistricting after the 2010 Census
State-by-state redistricting procedures
In states which use a traditional legislative process and have already chosen their committees, a total of 573 legislators have been appointed to redistricting committees. Of these 573, 251 (43.80%) are Democrats and 315 (56.20%) are Republicans.

Of the 50 states conducting redistricting this year, 23 of them were counted for this study based on the following factors:

  • Legislature has primary control of redistricting
  • Committee members have been appointed

States were not included if:

  • Redistricting is done by a bi-partisan or non-legislative commission
  • The committee in charge of redistricting has not yet been appointed

In the 23 states counted, Republicans hold 55.94% of seats. The average strength of state majorities for either chamber regardless of party is 63.71%. Committees generally represent these majorities with majority parties enjoying an average 66.25% majority on committees.

How states delegate redistricting authority

In each of the 50 states, redistricting is carried out by a variety of different processes. The majority of states simply conduct redistricting within the state legislature, using ordinary legislation. For this task, the legislature creates committees to draft or review redistricting proposals. Some states, like California, use an independent commission to draw new maps. Some of these commissions can be partisan while other's are bipartisan by law. Still other states use a hybrid approach with a combination of commissions and legislation.

Most/least partisan states

On average, most committees closely represent the partisan composition of their respective chamber. However, several states are either especially favorable to the majority or especially fair to the minority.

Most partisan

Least partisan

Detailed data

Partisan breakdown of redistricting committees

The following chart displays the partisan breakdown of committees that are charged with redistricting after the 2010 census.

Redistricting Committees
Senate House Total
State Democrats Republicans Democrats Republicans Independents Democrats Republicans
Alabama 2 9 4 7 6 16
Arkansas 4 4 12 8 16 12
Florida 8 15 6 15 14 30
Georgia 4 12 8 14 12 26
Illinois 10 6 6 5 16 11
Indiana 3 7 5 7 8 14
Kentucky 3 8 22 13 25 21
Louisiana 4 6 7 11 1 11 17
Massachusetts* 6 1 17 4 23 5
Michigan 3 6 3 6 6 12
Minnesota** 3 5 5 7 8 12
Mississippi 4 6 8 1 12 7
Nevada 3 2 9 6 12 8
New Mexico* 6 3 5 4 11 7
North Carolina 4 10 19 23 1 23 33
Oklahoma 3 9 4 5 7 14
Oregon 3 3 3 3 6 6
South Carolina*** 3 4 2 3 5 7
South Dakota 1 6 2 6 3 12
Texas 6 8 5 12 11 20
Utah 2 4 3 10 5 14
Virginia** 5 3 2 4 7 7
Wyoming 1 4 2 7 3 11
Total 91 141 160 181 2 251 322
  • * Massachusetts and New Mexico employ a joint legislative committee. In this table, members are counted by their respective chamber.
  • ** Minnesota and Virginia also have joint committees, but both are bipartisan and of equal representation.
  • *** South Carolina's redistricting committees are both subcommittees of the Judiciary Committee in their respective chamber.

Proportionality of committee representation

The following chart shows the proportion of majority committee members in relation to the partisan composition of the legislature. In general, minority members are well represented on committees, with only small deviation from equitable representation. However, several states have significantly more partisan commissions. The fact that these more heavily-weighted committees occur on both sides of the isle is reflected by the small average deviation.

State House Majority  % Majority  % on Committee Difference Senate Majority  % Majority  % on Committee Difference
Alabama Republican PartyRepublican 61.90% 63.64% 1.73% Republican PartyRepublican 62.86% 81.82% 18.96%
Arkansas Democratic PartyDemocratic 54.00% 60.00% 6.00% Democratic PartyDemocratic 57.14% 50.00% -7.14%
Florida Republican PartyRepublican 66.67% 71.43% 4.76% Republican PartyRepublican 70.00% 65.22% -4.78%
Georgia Republican PartyRepublican 64.44% 63.64% -0.81% Republican PartyRepublican 64.29% 75.00% 10.71%
Illinois Democratic PartyDemocratic 54.24% 54.55% 0.31% Democratic PartyDemocratic 59.32% 62.50% 3.18%
Indiana Republican PartyRepublican 60.00% 58.33% -1.67% Republican PartyRepublican 74.00% 70.00% -4.00%
Kentucky Democratic PartyDemocratic 59.00% 62.86% 3.86% Republican PartyRepublican 57.89% 72.73% 14.83%
Louisiana Republican PartyRepublican 52.38% 61.11% 8.73% Republican PartyRepublican 56.41% 60.00% 3.59%
Massachusetts* Democratic PartyDemocratic 80.00% 80.95% 0.95% Democratic PartyDemocratic 90.00% 85.71% -4.29%
Michigan Republican PartyRepublican 57.27% 66.67% 9.39% Republican PartyRepublican 68.42% 66.67% -1.75%
Minnesota Republican PartyRepublican 53.73% 58.33% 4.60% Republican PartyRepublican 55.22% 62.50% 7.28%
Mississippi Democratic PartyDemocratic 56.56% 88.89% 32.33% Republican PartyRepublican 51.92% 60.00% 8.08%
Nevada Democratic PartyDemocratic 61.90% 60.00% -1.90% Democratic PartyDemocratic 52.38% 60.00% 7.62%
New Mexico* Democratic PartyDemocratic 51.43% 55.56% 4.13% Democratic PartyDemocratic 64.29% 66.67% 2.38%
North Carolina Republican PartyRepublican 55.83% 54.76% -1.07% Republican PartyRepublican 62.00% 71.43% 9.43%
Oklahoma Republican PartyRepublican 69.31% 55.56% -13.75% Republican PartyRepublican 66.67% 75.00% 8.33%
Oregon Tie Tie Tie Tie Democratic PartyDemocratic 53.33% 50.00% -3.33%
South Carolina Republican PartyRepublican 61.29% 60.00% -1.29% Republican PartyRepublican 58.70% 57.14% -1.55%
South Dakota Republican PartyRepublican 71.43% 75.00% 3.57% Republican PartyRepublican 85.71% 85.71% 0.00%
Texas Republican PartyRepublican 67.33% 70.59% 3.25% Republican PartyRepublican 61.29% 57.14% -4.15%
Utah Republican PartyRepublican 77.33% 71.43% -0.41% Republican PartyRepublican 75.86% 66.67% -9.20%
Virginia Republican PartyRepublican 59.00% 66.67% 7.67% Democratic PartyDemocratic 55.00% 62.50% 7.50%
Wyoming Republican PartyRepublican 83.33% 77.78% -5.56% Republican PartyRepublican 86.67% 80.00% -6.67%
ZZZZTotal - 62.65% 65.35% 2.95% - 64.76% 67.15% 2.39%
  • * Massachusetts and New Mexico employ a joint legislative committee. In this table, members are counted by their respective chamber.