- Lead
- 106,685
- Total
- 374,267
- vs nation
- D+30.0
Washington 1st Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 120,121
- Total
- 395,186
- vs nation
- D+25.9
- Lead
- 83,332
- Total
- 327,624
- vs nation
- D+23.3
- Lead
- 67,647
- Total
- 307,937
- vs nation
- D+18.1
- Lead
- 70,331
- Total
- 296,293
- vs nation
- D+16.5
- Lead
- 35,097
- Total
- 279,121
- vs nation
- D+15.0
- Lead
- 26,062
- Total
- 242,557
- vs nation
- D+10.2
- Lead
- 29,501
- Total
- 219,976
- vs nation
- D+4.9
Key facts
- 2024 presidential margin
- D+28.5MIT Election Lab
- Population
- 771,6442024 5-year
- Population density
- 2,324 / sq mi2024 5-year · TIGER/Line
- Land area
- 332 sq miTIGER/Line
- Median household income
- $134,7992024 5-year
- White (non-Hispanic)
- 59.7%2024 5-year
- Black
- 2.6%2024 5-year
- Hispanic / Latino
- 9.8%2024 5-year
- Peak Democratic margin
- D+33.1 in 1936MIT Election Lab
- Peak Republican margin
- R+55.8 in 1904MIT Election Lab
- Most similar
- Congressional District 16, CA · twin score 89.2
presidential history
Party record book
Washington 1st Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
64.7%
30,384 votes · D+33.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 63.5%
Republican
Theodore Roosevelt1904
71.6%
6,585 votes · R+55.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 69.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
250,839votes
63.5% of the vote · D+30.4 · modeled estimate
Runner-up · Kamala Harris, 2024 · 232,665 votes
Republican
Donald Trump2020
130,718votes
33.1% of the vote · D+30.4 · modeled estimate
Runner-up · Donald Trump, 2024 · 125,980 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Kamala Harris2024
+30.0pts D vs U.S.
Place D+28.5 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +25.9 pts
Republican
Theodore Roosevelt1904
+36.1pts R vs U.S.
Place R+55.8 · U.S. R+19.7 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +23.3 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Washington's 1st stretches from Eastside tech suburbs east of Lake Washington into rural Snohomish County, blending high-income professional households with timber and farming communities in a district that has trended steadily toward Democratic margins over the past decade.
Across the recorded series it reached a Democratic high of 33.1 points in 1936 and a Republican high of 55.8 points in 1904. Between 2020 and 2024 the district moved 1.9 points toward the Republican candidate; the 2024 margin was 28.5 points.
A population of 771,644, a 60% non-Hispanic-white share, and a median household income of $134,799 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 16 and Congressional District 11.
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Washington 1st Congressional District. Akashic. https://akashic.app/cd/5301/. Accessed May 20, 2026. License: CC BY 4.0.