state senate districtWashington 48th State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+16.8
2008D+28.8
2012D+24.8
2016D+42.8
2020D+47.6
2024D+44.9
net swing · 2004→2024D+28.0D+16.8 → D+44.9
vs. U.S. · 2024D+46.4D+44.9 vs R+1.5
presidential returns
2024 turnout 69.9% of 89,878 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
44,059
15,883
2,840
62,782
89,878
69.9%
2020
48,764
16,623
2,102
67,489
87,623†
77.0%
2016
38,384
14,251
3,812
56,447
82,528†
68.4%
2012
34,673
20,585
1,658
56,916
77,247†
73.7%
2008
33,572
18,390
753
52,715
74,096†
71.1%
2004
30,060
21,295
690
52,045
70,944†
73.4%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupWA SD 48WashingtonUnited States
German10.7%14.5%12.5%
English9.8%12.1%9.5%
Irish7.7%9.8%9.4%
Italian3.0%3.1%4.8%
Norwegian3.0%4.0%—
American2.2%3.8%5.3%
Swedish2.1%1.8%—
Scottish2.1%2.6%1.3%
Chinese10.7%2.2%1.3%
Asian Indian9.4%2.0%1.4%
Filipino4.3%1.5%0.9%
Vietnamese4.1%1.1%0.6%
Korean3.0%0.9%0.4%
Japanese1.7%0.4%0.2%
Taiwanese0.8%——
Cambodian0.6%0.3%—
Mexican4.7%10.8%11.3%
Salvadoran0.3%0.4%0.7%
Puerto Rican0.3%0.5%1.8%
Spaniard0.3%0.4%—
Guatemalan0.2%0.2%0.5%
Honduran0.2%—0.3%
Colombian0.2%0.2%0.4%
Spanish0.2%0.3%—
African American†1.1%2.3%9.9%
Ethiopian0.3%0.3%—
African0.2%0.4%0.5%
Somali0.2%0.2%—
Samoan0.7%0.2%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
WA SD 48
Washington
United States
Median age
36.1
38.5
39.1
Age 18–24
8.1%
8.5%
9.2%
Age 65 and older
14.0%
16.7%
17.2%
Household economy
Measure
WA SD 48
Washington
United States
Median household income
$158,702
$98,141
$84,427
Poverty rate
6.3%
9.9%
12.5%
Bachelor's degree or higher (25+)
56.7%
39.3%
35.6%
Languages at home
Measure
WA SD 48
Washington
United States
Speaks a non-English language at home
31.1%
21.5%
22.3%
Spanish
7.1%
9.1%
13.6%
Other Indo-European
4.5%
2.1%
2.0%
Chinese (incl. Mandarin & Cantonese)
5.1%
1.9%
1.1%
Other Asian & Pacific Island
3.8%
2.1%
1.1%
Religious landscape
Measure
WA SD 48
Washington
United States
Catholic
—
10.7%
18.6%
Evangelical Protestant
—
20.5%
16.5%
Unclaimed / not counted
—
58.8%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Washington 48th State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+16.8%
2008
+28.8%
2012
+24.8%
2016
+42.8%
2020
+47.6%
2024
+44.9%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
70.2%Harris44,059
25.3%Trump15,883
4.5%
D+44.9
R+2.7
D+46.4
62,782
D
72.3%Biden48,764
24.6%Trump16,623
3.1%
D+47.6
D+4.9
D+43.2
67,489
D
68.0%Clinton38,384
25.2%Trump14,251
6.8%
D+42.8
D+18.0
D+40.7
56,447
D
60.9%Obama34,673
36.2%Romney20,585
2.9%
D+24.8
R+4.0
D+20.9
56,916
D
63.7%Obama33,572
34.9%McCain18,390
1.4%
D+28.8
D+12.0
D+21.5
52,715
D
57.8%Kerry30,060
40.9%Bush21,295
1.3%
D+16.8
—
D+19.3
52,045
current representation
Current officeholders
DVandana SlatterState Senate · 48
State legislative officeholder from OpenStates nightly current-legislator data.
Anchored in Seattle's core neighborhoods, the 48th Senate District recorded a 44.9-point Democratic presidential margin in 2024, reflecting the densely populated, highly educated electorate that defines much of the city's urban center.
Across the recorded series it reached a Democratic high of 47.6 points in 2020. Between 2020 and 2024 the district moved 2.7 points toward the Republican candidate; the 2024 margin was 44.9 points.
A population of 157,217, a 46% non-Hispanic-white share, and a median household income of $158,702 describe the district. The district's voting pattern over the last decade is most similar to that of Legislative (Senate) District 41 and Legislative (Senate) District 45.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Washington 48th State Senate District. Akashic. https://akashic.app/sld-upper/53048/. Accessed May 20, 2026. License: CC BY 4.0.
How did Washington 48th State Senate District vote in 2024?
In 2024, Washington 48th State Senate District voted Democratic by 44.9 points (D+44.9), carried by the Democratic candidate. Out of 62,782 votes cast, 44,059 went Democratic and 15,883 went Republican.
How many people live in Washington 48th State Senate District?
Washington 48th State Senate District has a population of 157,217 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Washington 48th State Senate District?
Median household income in Washington 48th State Senate District is $158,702 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Washington 48th State Senate District?
Akashic tracks 6 presidential elections in Washington 48th State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
