In most states, legislatures create and approve new congressional maps. In recent years, some states have created independent redistricting commissions to redraw maps. This newer alternative aims to reduce partisan gerrymandering and is more popular in Western states so far. Note that in New York and Virginia, the Legislature must approve the redistricting commission's map. Connecticut, Indiana and Ohio have “backup” commissions in case the Legislature's plan is not enacted. In Maine, Rhode Island and Utah, commissions play an advisory role.

Source: “Apportionment and Redistricting Process for the U.S. House of Representatives,” Congressional Research Service, Nov. 22, 2021, p. 15, https://tinyurl.com/3ba687xv

Data for the graphic are as follows:

State Redistricting Method
Alabama State Legislature
Alaska No Redistricting (single district)
Arizona Redistricting Commission
Arkansas State Legislature
California Redistricting Commission
Colorado Redistricting Commission
Connecticut State Legislature
Delaware No Redistricting (single district)
Florida State Legislature
Georgia State Legislature
Hawaii Redistricting Commission
Idaho Redistricting Commission
Illinois State Legislature
Indiana State Legislature
Iowa State Legislature
Kansas State Legislature
Kentucky State Legislature
Louisiana State Legislature
Maine State Legislature
Maryland State Legislature
Massachusetts State Legislature
Minnesota State Legislature
Mississippi State Legislature
Missouri State Legislature
Montana Redistricting Commission
Michigan Redistricting Commission
Nebraska State Legislature
New Hampshire State Legislature
New Jersey Redistricting Commission
New Mexico State Legislature
New York Redistricting Commission
Nevada State Legislature
North Carolina State Legislature
North Dakota No Redistricting (single district)
Ohio State Legislature
Oklahoma State Legislature
Oregon State Legislature
Pennsylvania State Legislature
Rhode Island State Legislature
South Carolina State Legislature
South Dakota No Redistricting (single district)
Tennessee State Legislature
Texas State Legislature
Utah State Legislature
Vermont No Redistricting (single district)
Virginia Redistricting Commission
Washington Redistricting Commission
West Virginia State Legislature
Wisconsin State Legislature
Wyoming No Redistricting (single district)

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