Tally of the 2025 to 2026 mid-decade redistricting: the net effect is 12 more Republican-leaning seats, 1 more Democratic-leaning seat, and 13 fewer seats that were close in 2024. Switch maps on and off to see who gained what.
Counting all nine states that adopted new US House maps for 2026, how many more Republican-leaning seats than before did the redraws create, net of the seats that moved the other way (California, Utah)?
Each row is a state whose new map is in use on 3 November. Squares show how many districts changed category versus the previous map. Filled squares are gains, hollow squares are losses. Click a state name to remove its new map from the total. Use the link under a row to read what happened there.
The Republican-led redraws alone move 12 districts into the Republican-leaning column. Texas contributes 5, Florida 3. They also remove 8 competitive seats and, on net, 4 Democratic-leaning seats.
California and Utah offset the Democratic side, not the competitive one. California's Proposition 50 adds 4 Democratic-leaning seats and removes 3 competitive ones and 1 Republican-leaning one. Utah's court-chosen map adds 1 Democratic-leaning seat and removes 1 Republican-leaning one. Add Ohio's commission map (R +2) and the Republican-leaning column grows by 14 before those 2 are subtracted.
The bigger story is the middle. Every adopted map, from either side, shrinks the competitive column, by 13 seats in total. Fewer seats can change hands on 3 November, so a given national swing moves fewer of them.
Cross-check with a different method: Bloomberg Government (8 July 2026) counted 16 additional Republican-leaning districts and 6 benefiting Democrats, a possible 10-seat net swing for Republicans. Counts differ because of method and date, for example how Alabama and Louisiana are classed.
| Missouri | The legislature passed a map adding a safely Republican seat (5th district), but the 2022 map stays for 2026 after a referendum fight in the courts. |
|---|---|
| Virginia | Democrats' amendment to redraw (a draft map was meant to net them four seats) was struck down by the courts; districts left in place. |
| Indiana | The state Senate rejected the proposal 31 to 19 in December 2025. |
| Others | Kansas, Maryland, New York, South Carolina, Wisconsin and Arkansas: districts left in place. |
The House currently has 218 Republicans, 214 Democrats, 1 independent and 2 vacancies; 218 seats make a majority. 60 members are retiring, the second most in a single cycle after 1992 (65). This page does not forecast the result. It shows how many seats the maps put in play.
Secondary source, stated plainly: official state sites and court dockets were not opened for this piece. The district counts and dates come from Wikipedia's article 2026 United States House of Representatives elections, section "Mid-decade redistricting changes" (retrieved 29 Oct 2026), which defines competitive seats as seats won by less than 10 points in 2024 and gives each state's change by column. Cross-check: Bloomberg Government, 8 July 2026.
Own calculations: the totals (D +1, competitive -13, R +12) are sums of the nine rows; each row sums to zero, which checks the column reading. The grouping by who drew the map is mine. "Net lean" is R-leaning gains minus D-leaning gains.