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 representation
Current officeholders
DClaudia KauffmanState Senate · 47
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
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.
Akashic
Political twins — state-senate districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Washington 47th State Senate District. Akashic. https://akashic.app/sld-upper/53047/. Accessed May 20, 2026. License: CC BY 4.0.
How did Washington 47th State Senate District vote in 2024?
In 2024, Washington 47th State Senate District voted Democratic by 15.1 points (D+15.1), carried by the Democratic candidate. Out of 67,138 votes cast, 37,383 went Democratic and 27,274 went Republican.
When did Washington 47th State Senate District last vote Republican?
The most recent presidential election in which Washington 47th State Senate District voted Republican was 2004.
How many people live in Washington 47th State Senate District?
Washington 47th State Senate District has a population of 157,002 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Washington 47th State Senate District?
Median household income in Washington 47th State Senate District is $106,938 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Washington 47th State Senate District?
Akashic tracks 38 presidential elections in Washington 47th State Senate District from 1876 to 2024. Of those, 5 went Democratic and 27 went Republican.