- Lead
- 10,109
- Total
- 67,138
- vs nation
- D+16.5
Washington 47th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 14,483
- Total
- 74,130
- vs nation
- D+15.1
- Lead
- 9,063
- Total
- 57,846
- vs nation
- D+13.6
- Lead
- 1,053
- Total
- 57,288
- vs nation
- R+2.0
- Lead
- 1,726
- Total
- 54,412
- vs nation
- R+4.1
- Lead
- 5,195
- Total
- 55,222
- vs nation
- R+6.9
- Lead
- 6,753
- Total
- 50,086
- vs nation
- R+14.0
- Lead
- 5,403
- Total
- 46,688
- vs nation
- R+20.1
Key facts
- 2024 presidential margin
- D+15.1MIT Election Lab
- Population
- 157,0022024 5-year
- Population density
- 2,508 / sq mi2024 5-year · TIGER/Line
- Land area
- 62.6 sq miTIGER/Line
- Median household income
- $106,9382024 5-year
- White (non-Hispanic)
- 49.4%2024 5-year
- Black
- 8.5%2024 5-year
- Hispanic / Latino
- 13.2%2024 5-year
- Peak Democratic margin
- D+19.5 in 2020MIT Election Lab
- Peak Republican margin
- R+73.1 in 1904MIT Election Lab
- Most similar
- Legislative (Senate) District 11, WA · twin score 94.7
presidential history
Party record book
Washington 47th State Senate 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
Joe Biden2020
58.3%
43,205 votes · D+19.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 55.7%
Republican
Theodore Roosevelt1904
82.0%
2,098 votes · R+73.1 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 81.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
43,205votes
58.3% of the vote · D+19.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 37,383 votes
Republican
Ronald Reagan1984
32,919votes
71.4% of the vote · R+43.9 · modeled estimate
Runner-up · George W. Bush, 2004 · 29,801 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
+16.5pts D vs U.S.
Place D+15.1 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +15.1 pts
Republican
Theodore Roosevelt1904
+53.4pts R vs U.S.
Place R+73.1 · U.S. R+19.7 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +47.3 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | D | 74.4%59,713 | 25.6%20,495 | 80,208 |
| 2018 | D | 81.0%51,134 | 19.0%11,981 | 63,115 |
Washington's 47th Senate district, anchored in the Auburn and Federal Way corridor, has shifted toward Republican presidential candidates by double digits, reflecting the area's mix of working-class suburbs and exurban communities south of Seattle.
Across the recorded series it reached a Democratic high of 19.5 points in 2020 and a Republican high of 73.1 points in 1904. Between 2020 and 2024 the district moved 4.5 points toward the Republican candidate; the 2024 margin was 15.1 points.
A population of 157,002, a 49% non-Hispanic-white share, and a median household income of $106,938 describe the district. The district's voting pattern over the last decade is most similar to that of Legislative (Senate) District 11 and Legislative (Senate) District 30.
The state-senate 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 47th State Senate District. Akashic. https://akashic.app/sld-upper/53047/. Accessed May 20, 2026. License: CC BY 4.0.