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State redistricting timelines following the 2010 census

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Redistricting
State-by-state
redistricting procedures
Majority-minority districts
Congressional district demographics
United States census,
2020
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Redistricting is the process of drawing new congressional and state legislative district boundaries. Following the 2010 census, each of the states drew and enacted new district maps for the nation's 435 congressional districts and 7,382 state legislative seats across 99 chambers.

This article details redistricting deadlines in the states in the 2010 cycle. For more information on the overall redistricting process following the 2010 census, click here. For information regarding the redistricting process following the 2020 census, click here.

This article includes the following information:

  1. Redistricting timelines after the 2010 census: Background information on initial enactment dates for district maps enacted during the 2010 redistricting cycle.
  2. Types of redistricting: A brief overview of the main processes used during redistricting.
  3. Congressional apportionment outcomes: An examination of states that gained or lost congressional seats following the 2010 census.

Redistricting timelines after the 2010 census

In the 2010 redistricting cycle, redistricting authorities enacted 43 new congressional district maps and 50 new state legislative district maps. The majority of these – 63 maps (31 congressional and 32 state legislative), 67.74 percent of the total– were enacted in 2011. In 2012, 28 maps (12 congressional and 16 state legislative) were enacted, 30.11 percent of the total. The remaining maps were enacted in the first six months of 2013.

The table and bar charts below list initial congressional and state legislative district map enactment dates for all 50 states in the 2010 cycle. These graphics do not take into account maps that were subsequently redrawn.


The charts below show congressional and state legislative district map enactment dates for all 50 states in the 2010 cycle. These graphics do not take into account maps that were subsequently redrawn.


Redistricting in the United States
Redistricting in NevadaRedistricting in MassachusettsRedistricting in ColoradoRedistricting in New MexicoRedistricting in WyomingRedistricting in ArizonaRedistricting in MontanaRedistricting in CaliforniaRedistricting in OregonRedistricting in WashingtonRedistricting in IdahoRedistricting in TexasRedistricting in OklahomaRedistricting in KansasRedistricting in NebraskaRedistricting in South DakotaRedistricting in North DakotaRedistricting in MinnesotaRedistricting in IowaRedistricting in MissouriRedistricting in ArkansasRedistricting in LouisianaRedistricting in MississippiRedistricting in AlabamaRedistricting in GeorgiaRedistricting in FloridaRedistricting in South CarolinaRedistricting in IllinoisRedistricting in WisconsinRedistricting in TennesseeRedistricting in North CarolinaRedistricting in IndianaRedistricting in OhioRedistricting in KentuckyRedistricting in PennsylvaniaRedistricting in New JerseyRedistricting in New YorkRedistricting in VermontRedistricting in VermontRedistricting in New HampshireRedistricting in MaineRedistricting in West VirginiaRedistricting in VirginiaRedistricting in MarylandRedistricting in MarylandRedistricting in ConnecticutRedistricting in ConnecticutRedistricting in DelawareRedistricting in DelawareRedistricting in Rhode IslandRedistricting in Rhode IslandRedistricting in MassachusettsRedistricting in New HampshireRedistricting in MichiganRedistricting in MichiganRedistricting in AlaskaRedistricting types map.png


This map displays what type of redistricting each state uses.

Types of redistricting

See also: State-by-state redistricting procedures

In each state, there are three general processes by which districts are re-drawn.

  • Legislative authority
  • Commission
  • Hybrid of both legislative and commission

Congressional apportionment outcomes

See also: State Legislative and Congressional Redistricting after the 2010 Census

The breakdown of states that won and lost new seats in the Congressional reapportionment are as follows:[1]

States that Added Congressional Seats after 2010 Census
State Before 2010 census After 2010 census[2]
Arizona 8 9 (+1)
Florida 25 27 (+2)
Georgia 13 14 (+1)
Nevada 3 4 (+1)
South Carolina 6 7 (+1)
Texas 32 36 (+4)
Utah 3 4 (+1)
Washington 9 10 (+1)
States that Lost Congressional Seats after 2010 Census
State Before 2010 census After 2010 census[3]
Illinois 19 18 (-1)
Iowa 5 4 (-1)
Louisiana 7 6 (-1)
Massachusetts 10 9 (-1)
Michigan 15 14 (-1)
Missouri 9 8 (-1)
New Jersey 13 12 (-1)
New York 29 27 (-2)
Ohio 18 16 (-2)
Pennsylvania 19 18 (-1)

See also

External links

Footnotes

  1. ↑ New York Times, "Census 2010:Gains and Losses in Congress," December 21, 2010
  2. ↑ Official 2010 Apportionment from Census
  3. ↑ Official 2010 Apportionment from Census
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