Do independent redistricting commissions end gerrymandering? The evidence from the states that use them says they reduce the most extreme districting while producing their own controversies: commission-drawn maps since 2010 in California, Arizona, Washington, Idaho and New Jersey have generated fewer lopsided districts on average than legislature-drawn maps in comparable states, yet several — including California's 2021 congressional plan and Arizona's mid-decade legislative redraws — were challenged in court, and the commissions' defining feature remains who appoints the commissioners and who can sue. In the 2024 House elections, the average margin in commission-drawn states ran narrower than in states where legislatures controlled the pen, per margins computed from certified results.
How many states actually use commissions?
For congressional maps, a handful: California's 14-member Citizens Commission, Arizona's five-member commission selected through a screened appointments process, Washington's bipartisan commission, Idaho's six-member bipartisan commission, and Montana's commission, with New Jersey using a commission for state legislative lines. Most states still let legislatures draw both maps, subject only to the governor's veto and federal law. That asymmetry is the first caveat in any commission analysis: the comparison group is large and varied.
What did the commissions produce after 2020?
California's 2020 commission drew 52 congressional districts that plaintiffs challenged as a racial gerrymander under the Voting Rights Act; a federal panel upheld the map's provisions for the contested districts, and the litigation continued into the mid-2020s. Washington's commission famously missed its own deadline in 2021, sending the lines to the state supreme court. New York — not a commission state for Congress — flipped the comparison the other way: its legislature's first 2022 map was struck as an unconstitutional partisan gerrymander by the state's highest court, per the court's own opinion, and the remedial process produced one of the nation's most-watched map fights heading into 2024 and 2026.
Do commission maps produce competition?
Generally, modestly more. Political scientists' competitiveness indices show commission states with more districts decided inside ten points, and fewer «dummied» districts where one party's voters are cracked or packed wholesale. But commissions operate under the same population-equality mandates (districts within a person or two of the ideal, per the 1964 Wesberry v. Sanders line of cases) and the same Voting Rights Act section 2 constraints as legislatures — and with 435 single-member districts sorted into two parties' coalitions, the number of genuinely competitive seats is structurally limited.
Where do commissions run into trouble?
- Selection: New Jersey and Virginia ballot questions in 2020–2022 asked voters to change commission membership and delay redistricting — New Jersey's ballot question on timing failed, a rare public rebuke of a commission design.
- Deadlines: missed deadlines hand maps to courts or backup officials, as in Washington in 2021.
- Partisan holdouts: Arizona's commission repeatedly split 3–2, producing lawsuits over each decade's maps.
- Transparency vs. negotiation: closed-door drafting sessions have drawn challenges under state open-meeting laws.
What happens when states flip control mid-decade?
Mid-decade redistricting is the new frontier: after courts or new majorities intervene, states including North Carolina (2023–2024 legislative redraws), New York (court-supervised and then legislature-driven revisions) and Ohio (rejected 2023 map, replacement approved for 2024) have all redrawn lines within a single decade. Commissions are not immune — their maps can be amended by statute or court order like any other — so the 2026 cycle's map litigation in several states is as much about who gets the last redraw as about the first.
FAQ
Which was the first modern independent commission?
Arizona's, created by voters in 2000; California followed with its citizens commission in 2008, expanded to congressional maps in 2010.
Can a commission's map be thrown out?
Yes — California's 2021 plan survived a VRA challenge, but other commissions' maps have been revised by courts for population or Voting Rights Act violations.
Do commissions consider incumbents' homes?
Most are barred by state rules from using partisan data or incumbent addresses; California's rules forbid considering incumbents' residences except where it doesn't matter.
For more context, read Why Primaries Keep Moving Earlier: The Frontloading Ratchet.
For more context, read midterm elections history.
For more context, read How Automatic Recount Thresholds Vary From State to State.