- Lead
- 64,291
- Total
- 359,297
- vs nation
- D+19.4
Washington 10th Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 66,997
- Total
- 381,161
- vs nation
- D+13.1
- Lead
- 40,446
- Total
- 299,318
- vs nation
- D+11.4
- Lead
- 50,949
- Total
- 285,626
- vs nation
- D+14.0
- Lead
- 54,463
- Total
- 278,290
- vs nation
- D+12.3
- Lead
- 25,980
- Total
- 255,744
- vs nation
- D+12.6
- Lead
- 26,760
- Total
- 220,313
- vs nation
- D+11.6
- Lead
- 35,894
- Total
- 197,629
- vs nation
- D+9.6
Key facts
- 2024 presidential margin
- D+17.9MIT Election Lab
- Population
- 768,6762024 5-year
- Population density
- 1,086 / sq mi2024 5-year · TIGER/Line
- Land area
- 708 sq miTIGER/Line
- Median household income
- $94,4272024 5-year
- White (non-Hispanic)
- 60.0%2024 5-year
- Black
- 6.7%2024 5-year
- Hispanic / Latino
- 12.9%2024 5-year
- Peak Democratic margin
- D+44.9 in 1936MIT Election Lab
- Peak Republican margin
- R+49.7 in 1904MIT Election Lab
- Most similar
- Congressional District 2, WA · twin score 91.5
presidential history
Party record book
Washington 10th 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
70.5%
34,861 votes · D+44.9 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 68.0%
Republican
Theodore Roosevelt1904
68.7%
6,566 votes · R+49.7 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 65.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
216,875votes
56.9% of the vote · D+17.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 204,934 votes
Republican
Donald Trump2020
149,878votes
39.3% of the vote · D+17.6 · modeled estimate
Runner-up · Donald Trump, 2024 · 140,643 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
Franklin D. Roosevelt1940
+20.8pts D vs U.S.
Place D+30.7 · U.S. D+9.9 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · +20.7 pts
Republican
Theodore Roosevelt1904
+30.0pts R vs U.S.
Place R+49.7 · U.S. R+19.7 · modeled estimate
Runner-up · William H. Taft, 1908 · +21.1 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 10th stretches across the south Puget Sound region, anchored by Olympia and Lacey, where state-government employment and suburban growth have reinforced a consistent Democratic margin of roughly 15 points in recent presidential cycles.
Across the recorded series it reached a Democratic high of 44.9 points in 1936 and a Republican high of 49.7 points in 1904. The 2024 margin was 17.9 points.
A population of 768,676, a 60% non-Hispanic-white share, and a median household income of $94,427 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 2 and Congressional District 6.
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 10th Congressional District. Akashic. https://akashic.app/cd/5310/. Accessed May 20, 2026. License: CC BY 4.0.