Who draws the lines?

Redistricting status map

Republican control  
Democratic control  
Split control  

Party control - congressional lines

The table below shows the partisan control of bodies controlling congressional lines in the 2010 redistricting cycle. The first three column headers are sortable: just click on the header to sort the data.

State Seats Control Governor Upper House Lower House
Alabama 7 Republican R 12 D, 22 R 39 D, 66 R
Alaska 1 One congressional district -- no redistricting necessary
Arizona 9 Split Bipartisan independent commission
Arkansas 4 Democratic D 20 D, 15 R 55 D, 44 R, 1 O
California 53 Split Bipartisan independent commission
Colorado 7 Split D 20 D, 15 R 32 D, 33 R
Connecticut 5 Split (need 66%) No veto 23 D, 13 R 100 D, 51 R
Delaware 1 One congressional district -- no redistricting necessary
Florida 27 Republican R 12 D, 28 R 39 D, 81 R
Georgia 14 Republican R 20 D, 36 R 66 D, 113 R, 1 O
Hawaii 2 Split Bipartisan politician commission
Idaho 2 Split Bipartisan independent commission
Illinois 18 Democratic D 35 D, 24 R 64 D, 54 R
Indiana 9 Republican R 13 D, 37 R 40 D, 59 R
Iowa 4 Split R 26 D, 24 R 40 D, 60 R
Kansas 4 Republican R 8 D, 32 R 33 D, 92 R
Kentucky 6 Split D 15 D, 22 R 58 D, 42 R
Louisiana 6 Republican R 17 D, 22 R 49 D, 52 R, 4 O
Maine 2 Split (need 66%) R 14 D, 20 R, 1 O 72 D, 78 R, 1 O
Maryland 8 Democratic D 35 D, 12 R 98 D, 43 R
Massachusetts 9 Democratic D 36 D, 4 R 128 D, 31 R
Michigan 14 Republican R 12 D, 26 R 47 D, 63 R
Minnesota 8 Split D 30 D, 37 R 62 D, 72 R
Mississippi 4 Split R 26 D, 25 R, 1 O 72 D, 50 R
Missouri 8 Split D 8 D, 26 R 57 D, 106 R
Montana 1 One congressional district -- no redistricting necessary
Nebraska 3 Nonpartisan R Nonpartisan legislature
Nevada 4 Split R 11 D, 10 R 26 D, 16 R
New Hampshire 2 Republican (vetoproof) D 5 D, 19 R 102 D, 298 R
New Jersey 12 Split Bipartisan politician commission
New Mexico 3 Split R 27 D, 15 R 37 D, 33 R
New York 27 Split D 30 D, 32 R 100 D, 48 R
North Carolina 13 Republican No veto 19 D, 31 R 52 D, 67 R, 1 O
North Dakota 1 One congressional district -- no redistricting necessary
Ohio 16 Republican R 10 D, 23 R 40 D, 59 R
Oklahoma 5 Republican R 16 D, 32 R 31 D, 70 R
Oregon 5 Split D 16 D, 14 R 30 D, 30 R
Pennsylvania 18 Republican R 20 D, 30 R 91 D, 112 R
Rhode Island 2 Democratic (vetoproof) I 29 D, 8 R 65 D, 10 R
South Carolina 7 Republican R 19 D, 27 R 48 D, 75 R, 1 O
South Dakota 1 One congressional district -- no redistricting necessary
Tennessee 9 Republican R 13 D, 19 R, 1 O 33 D, 64 R, 2 O
Texas 36 Republican R 12 D, 19 R 49 D, 101 R
Utah 4 Republican R 7 D, 22 R 17 D, 58 R
Vermont 1 One congressional district -- no redistricting necessary
Virginia 11 Republican R 20 D, 20 R 32 D, 67 R
Washington 10 Split Bipartisan independent commission
West Virginia 3 Democratic D 28 D, 6 R 65 D, 35 R
Wisconsin 8 Republican R 14 D, 19 R 38 D, 60 R
Wyoming 1 One congressional district -- no redistricting necessary

Congress State legislature   Maps & Data   States      
     Current status      Current status            Alabama      Indiana      Nebraska      South Carolina
     Timing      Timing            Alaska      Iowa      Nevada      South Dakota
     Authority      Authority   Litigation        Arizona      Kansas      New Hampshire      Tennessee
          Institution           Institution            Arkansas      Kentucky      New Jersey      Texas
          Party control           Party control            California      Louisiana      New Mexico      Utah
     Criteria      Criteria   Reform        Colorado      Maine      New York      Vermont
               Connecticut      Maryland      North Carolina      Virginia
               Delaware      Massachusetts      North Dakota      Washington
               Florida      Michigan      Ohio      West Virginia
         Georgia      Minnesota      Oklahoma      Wisconsin
Overview of redistricting     Further resources        Hawaii      Mississippi      Oregon      Wyoming
Why it matters Redistricting criteria        My work        Idaho      Missouri      Pennsylvania  
Public engagement Preclearance        Tools        Illinois      Montana      Rhode Island