U.S. House seat · lines in effect since 2022
Washington's 1st District
A district of about 764,000 people, 22% Asian, 53% of adults with a bachelor's degree. It votes D+30.5 relative to the nation for president.
Source: 2026 results: Washington Secretary of State and civicAPI; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET
Where it sits among all 435 seats
Every U.S. House seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Labels below the bar mark 9 other seats in Washington.
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2020 | 2022 | 2024 | 2026 | |
|---|---|---|---|---|
| Governor | D+11.0 | No race | No race | No race |
| U.S. House | No race | D+27.1 | D+26.3 | D+33.9 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: Washington Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 435 seats. Small marks are other seats in Washington. The black marker is WA-1.
Higher than 93% of seats.
Lower than 64% of seats.
Lower than 62% of seats.
Lower than 81% of seats.
Higher than 97% of seats.
Denser than 79% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
CA-1021% Hispanic · 52% college gradsD+35.9Held DCA-50
56% college gradsD+19.6Held DIL-9
56% college gradsD+38.2Held DNJ-12
23% Hispanic · 49% college gradsD+27.1Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2022.
- Suzan K. Delbene (D)
2023– · Won 2022 by 27.1, 2024 by 26.3, 2026 by 33.9
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)