Mid-decade redistricting, 2025–26: which states redrew their maps
The states that redrew congressional districts before the 2026 elections, what the sources estimate each new map favours, and which maps courts or voters stopped.
What redistricting is
In the United States the boundaries of the 435 U.S. House districts are drawn by each state, by its legislature or by a commission, and normally redrawn once after every census. Because boundaries decide which voters are grouped together, they can favour one party; drawing them for that purpose is called gerrymandering, and people in both parties use the word about maps they oppose. Courts decide whether a map is lawful.
In 2025–26 several states redrew their maps in the middle of the decade, which is unusual. The table lists those states with the date the map was enacted, the advantage that the sources cited on Wikipedia estimate for the new map (in seats, before any vote), whether voters decided on a ballot measure, and whether a court blocked the map or drew one. An estimate is not a result: actual seats depend on the votes. A struck-through estimate means the map was not used in 2026.
Wikipedia’s own net total for the maps in force is R +9 seats. To see what happened in the elections, open the 2026 results and the House battleground map.
The states that redrew their mapsdate, estimated advantage, ballot measures and court action
| Date enacted | State | Estimated advantage | Ballot measure | Measure result | Blocked by a court | Court drew the map |
|---|---|---|---|---|---|---|
| August 29, 2025 | Texas | R +5 seats | No | — | No | No |
| September 28, 2025 | Missouri | Yes | Yes 37.56 - No 62.44 | Yes | No | |
| October 22, 2025 | North Carolina | R +1 seat | No | — | No | No |
| October 31, 2025 | Ohio | R +2 seats | No | — | No | No |
| November 4, 2025 | California | D +5 seats | Yes | Yes 64.42 - No 35.58 | No | No |
| November 10, 2025 | Utah | D +1 seat | No | — | No | Yes |
| April 21, 2026 | Virginia | Yes | Yes 51.61 - No 48.39 | Yes | No | |
| May 4, 2026 | Florida | R +4 seats | No | — | No | No |
| May 7, 2026 | Tennessee | R +1 seat | No | — | No | No |
| May 29, 2026 | Louisiana | R +1 seat | No | — | No | No |
| June 2, 2026 | Alabama | R +1 seat | No | — | No | No |
Source: Wikipedia, “2025–2026 United States redistricting” (CC BY-SA 4.0), checked 2026-11-10 13:36 UTC. Estimate We take no side on any map. This is a United States topic: the rules for drawing districts differ in other countries.