Who draws the lines?

Note: The map and table below show party control of the congressional lines based on the current configuration of institutions and officeholders, after the 2018 midterm elections. Several governors and thousands of state legislators will be on the ballot in November 2020; the outcome of those elections will likely change this landscape. This page will be updated again after the 2020 elections.

Hovering over the state will reveal the party that had been in control of congressional lines in 2010.

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 2020 redistricting cycle, reflecting institutions and officeholders after the 2018 elections. The "seats" reflect likely congressional seats given recent growth patterns (but do not attempt to control for the impact of an inaccurate Census). 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 6 Republican (vetoproof) R 8 D, 27 R 28 D, 77 R
Alaska 1 One congressional district -- no redistricting necessary
Arizona 10 Split Bipartisan independent commission
Arkansas 4 Republican (vetoproof) R 9 D, 26 R 24 D, 76 R
California 53 Split Bipartisan independent commission
Colorado 8 Split Bipartisan independent commission
Connecticut 5 Split (need 66%) No veto 22 D, 14 R 91 D, 60 R
Delaware 1 One congressional district -- no redistricting necessary
Florida 29 Republican R 17 D, 23 R 47 D, 73 R
Georgia 14 Republican R 21 D, 35 R 75 D, 105 R
Hawaii 2 Split Bipartisan politician commission
Idaho 2 Split Bipartisan independent commission
Illinois 17 Democratic (vetoproof) D 40 D, 19 R 74 D, 44 R
Indiana 9 Republican (vetoproof) R 10 D, 40 R 33 D, 67 R
Iowa 4 Republican R 18 D, 32 R 47 D, 53 R
Kansas 4 Republican (vetoproof) D 11 D, 28 R, 1 I 41 D, 84 R
Kentucky 6 Republican (vetoproof) R 9 D, 29 R 39 D, 61 R
Louisiana 6 Split D 14 D, 25 R 39 D, 62 R, 4 I
Maine 2 Split (need 66%) D 21 D, 14 R 89 D, 56 R, 6 I
Maryland 8 Democratic (vetoproof) R 32 D, 15 R 99 D, 42 R
Massachusetts 9 Democratic (vetoproof) R 34 D, 6 R 127 D, 32 R, 1 I
Michigan 13 Split Bipartisan independent commission
Minnesota 7 Split D 32 D, 35 R 75 D, 59 R
Mississippi 4 Republican R 19 D, 33 R 46 D, 73 R, 1 TBD
Missouri 8 Republican (vetoproof) R 10 D, 24 R 46 D, 114 R, 3 TBD
Montana 1 One congressional district -- no redistricting necessary
Nebraska 3 Nonpartisan R Nonpartisan legislature
Nevada 4 Democratic D 13 D, 8 R 29 D, 13 R
New Hampshire 2 Split R 14 D, 10 R 233 D, 167 R
New Jersey 12 Split Bipartisan politician commission
New Mexico 3 Democratic D 26 D, 16 R 46 D, 24 R
New York 26 Split (need 66%) D 39 D, 22 R, 1 I, 1 TBD 106D, 43 R, 1 I
North Carolina 14 Republican No veto 21 D, 29 R 55 D, 65 R
North Dakota 1 One congressional district -- no redistricting necessary
Ohio 15 Republican (vetoproof) R 9 D, 24 R 38 D, 61 R
Oklahoma 5 Republican (vetoproof) R 9 D, 39 R 24 D, 77 R
Oregon 6 Democratic D 18 D, 12 R 38 D, 22 R
Pennsylvania 17 Split D 22 D, 28 R 93 D, 110 R
Rhode Island 1 One congressional district -- no redistricting necessary
South Carolina 7 Republican R 19 D, 27 R 44 D, 80 R
South Dakota 1 One congressional district -- no redistricting necessary
Tennessee 9 Republican (vetoproof) R 5 D, 28 R 26 D, 73 R
Texas 39 Republican R 12 D, 19 R 67 D, 83 R
Utah 4 Republican (vetoproof) R 6 D, 23 R 16 D, 59 R
Vermont 1 One congressional district -- no redistricting necessary
Virginia 11 Split D 19 D, 21 R 49 D, 51 R
Washington 10 Split Bipartisan independent commission
West Virginia 2 Republican (vetoproof) R 14 D, 20 R 41 D, 59 R
Wisconsin 8 Split D 14 D, 19 R 36 D, 63 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