Washington
10 congressional districts.
Map
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
Select a district for details.
The area outlined with dashes on the map, enlarged so its smaller districts can be seen.
Map used in 2026
2021 Redistricting Commission plan as amended by the Legislature (HCR 4407)
- Drawn by
- a redistricting commission
- Enacted
- 2022-02-08
- Changed since 2024
- No
Source: Washington State Redistricting Commission (checked 2026-11-04)
Districts
| District | Irregularity | National rank |
|---|---|---|
| WA-01 | Irregularity score 83 Very irregular | 52nd least compact |
| WA-02 | Irregularity score 52 Middle of the pack | 199th least compact |
| WA-03 | Irregularity score 18 Very compact | 381st least compact |
| WA-04 | Irregularity score 69 Irregular | 109th least compact |
| WA-05 | Irregularity score 8 Very compact | 416th least compact |
| WA-06 | Irregularity score 33 Compact | 305th least compact |
| WA-07 | Irregularity score 69 Irregular | 110th least compact |
| WA-08 | Irregularity score 44 Middle of the pack | 244th least compact |
| WA-09 | Irregularity score 54 Middle of the pack | 189th least compact |
| WA-10 | Irregularity score 64 Irregular | 135th least compact |
Scores describe shape, not intent. How scores work
Washington's senators
- Maria Cantwell, Democrat
- Patty Murray, Democrat
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Partisan fairness
How the 2024 presidential vote splits across these districts. Kamala Harris (Democrat) won 59.5% of the two-party vote and carried 7 of 10 districts.
- Efficiency gap
- 1.8% Favors Democrats
Counts each party's wasted votes: votes for a losing candidate, plus a winner's votes beyond the half needed to win. The gap is the difference between the two parties' wasted votes, as a share of all votes.
- Mean-median difference
- 0.5 points Favors Democrats
The gap between a party's average vote share across the districts and its share in the middle (median) district. When the middle district leans away from a party's average, that party's voters are packed into a few lopsided districts.
- Declination
- 0.03 Favors Republicans
Compares how lopsided each party's wins are. A party that wins a few districts by huge margins and loses the rest narrowly is at a disadvantage. Runs from 0 (even) to 1.
Votes are 2024 presidential results by precinct, added up within each district. This state used the same districts in 2024 and 2026. These measures show how a map turns one election's votes into seats. They don't show why the lines were drawn, and they shift from one election to the next. How fairness scores work