Washington 40th State Senate District, Washington: Democratic loyalist district. In 2024, voted D+35%. Republican peak: R+55 in 1904.
Key facts
- 2024 presidential margin
- D+35MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 40,2742024 5-year
- Median household income
- $85,1032024 5-year
- White (non-Hispanic)
- 81.3%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 11.5%2024 5-year
- Peak Democratic margin
- D+35 in 2024MIT Election Lab
- Peak Republican margin
- R+55 in 1904MIT 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.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 16,582 | 7,760 | 25,384 | ||
| D | 16,889 | 8,148 | 25,864 | ||
| D | 12,267 | 6,654 | 21,334 | ||
| D | 12,219 | 7,208 | 20,233 | ||
| D | 12,633 | 6,901 | 19,917 | ||
| D | 10,965 | 7,353 | 18,715 | ||
| D | 7,727 | 6,456 | 15,652 | ||
| D | 6,549 | 5,164 | 13,800 | ||
| D | 5,931 | 4,138 | 13,491 | ||
| D | 5,473 | 5,149 | 10,857 | ||
| R | 4,739 | 5,739 | 10,672 | ||
| R | 3,472 | 4,649 | 9,734 | ||
| R | 3,450 | 4,022 | 7,908 | ||
| R | 2,380 | 4,028 | 6,650 | ||
| R | 2,211 | 2,711 | 5,295 | ||
| D | 3,046 | 2,023 | 5,087 | ||
| R | 2,203 | 2,899 | 5,138 | ||
| R | 2,035 | 2,928 | 4,983 | ||
| R | 1,915 | 2,909 | 4,870 | ||
| R | 1,985 | 2,164 | 4,373 | ||
| D | 2,120 | 1,958 | 4,116 | ||
| D | 2,371 | 2,100 | 4,524 | ||
| D | 2,301 | 1,550 | 4,105 | ||
| D | 2,012 | 1,401 | 3,714 | ||
| R | 828 | 2,197 | 3,058 | ||
| R | 187 | 1,601 | 2,750 | ||
| R | 455 | 1,707 | 2,853 | ||
| D | 1,338 | 1,296 | 2,995 | ||
| O | 604 | 738 | 2,712 | ||
| R | 411 | 1,058 | 1,718 | ||
| R | 241 | 1,063 | 1,495 | ||
| R | 426 | 718 | 1,211 | ||
| R | 530 | 609 | 1,147 | ||
| R | 357 | 531 | 1,068 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
16.6%
German
16.2%
Irish
11.9%
Scottish
4.5%
Italian
3.5%
American
3.1%
French
2.7%
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: 47.9 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
$85,103
Legislative (Senate) District 40 ranks near the middle of US counties.
Legislative (Senate) District 40$85,103
Washington$98,141
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.8%
Child poverty is below the national average.
Children under 1814.6%
Working age (18–64)11.7%
Seniors (65+)8.5%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
89.2%
speak English only
Spanish6.7%
Other Indo-European2.4%
Asian & Pacific Islander1.3%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 66.8% 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 thirty-five points in 2024. The margin in 2024 was thirty-five points — still decisive.
Its loyalty is rooted in its place. Median household income of $85,103, a 81% non-Hispanic-white share, and a population of 40,274 together describe a district whose political habits are deeply settled.
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.
Legislative (Senate) District 40, Washington. Akashic. https://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 34.8 points (D+35), carried by the Democratic candidate. Out of 25,384 votes cast, 16,582 went Democratic and 7,760 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 38 elections in the dataset, the district has voted Democratic 16 times, Republican 17 times, and other 1 times.
When did Legislative (Senate) District 40, Washington last vote Republican?
The most recent presidential election in which Legislative (Senate) District 40, Washington voted Republican was 1984.
How many people live in Legislative (Senate) District 40, Washington?
Legislative (Senate) District 40, Washington has a population of 40,274 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 $85,103 — 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 38 presidential elections in Legislative (Senate) District 40, Washington from 1876 to 2024. Of those, 16 went Democratic and 17 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.