Washington 40th State Senate District, Washington: Democratic loyalist district. In 2024, voted D+22%. Democratic peak: D+22 in 2024.
Key facts
- 2024 presidential margin
- D+22MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 156,6732024 5-year
- Median household income
- $85,4312024 5-year
- White (non-Hispanic)
- 77.6%2024 5-year
- Black
- 0.8%2024 5-year
- Hispanic / Latino
- 14.1%2024 5-year
- Peak Democratic margin
- D+22 in 2024MIT Election Lab
Constituent county margins for Legislative (Senate) District 40, WAOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 53,759 | 33,898 | 91,165 | ||
| D | 54,730 | 35,497 | 93,246 | ||
| D | 39,147 | 27,910 | 75,521 | ||
| D | 39,173 | 29,123 | 70,961 | ||
| D | 40,476 | 28,019 | 70,281 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
15.5%
English
14.7%
Irish
10.9%
Scottish
3.6%
American
3.4%
Italian
3.4%
French
2.5%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 42.1 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$85,431
Legislative (Senate) District 40 ranks near the middle of US counties.
Legislative (Senate) District 40$85,431
Washington$98,141
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
12.1%
Child poverty is below the national average.
Children under 1814.9%
Working age (18–64)11.9%
Seniors (65+)8.0%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
86.6%
speak English only
Spanish8.8%
Other Indo-European2.6%
Asian & Pacific Islander1.6%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 60.7% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of D+40.9, this district anchors the deep-blue core of the Seattle metro area, where dense, highly educated neighborhoods consistently produce some of the state's widest partisan gaps.
The Democratic margin in Washington 40th State Senate District reached its widest at twenty-two points in 2024. The margin in 2024 was twenty-two points — still decisive.
Its loyalty is rooted in its place. Median household income of $85,431, a 78% non-Hispanic-white share, and a population of 156,673 together describe a district whose political habits are deeply settled.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Legislative (Senate) District 40, Washington — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/sld-upper/53040/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Legislative (Senate) District 40, Washington vote in 2024?
In 2024, Legislative (Senate) District 40, Washington voted Democratic by 21.8 points (D+22), carried by the Democratic candidate. Out of 91,165 votes cast, 53,759 went Democratic and 33,898 went Republican.
What is Legislative (Senate) District 40, Washington's political archetype?
Akashic classifies Legislative (Senate) District 40, Washington as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 5 elections in the dataset, the district has voted Democratic 5 times, Republican 0 times, and other 0 times.
How many people live in Legislative (Senate) District 40, Washington?
Legislative (Senate) District 40, Washington has a population of 156,673 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Legislative (Senate) District 40, Washington?
Median household income in Legislative (Senate) District 40, Washington is $85,431 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Legislative (Senate) District 40, Washington?
Akashic tracks 5 presidential elections in Legislative (Senate) District 40, Washington from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.