Washington 31st State Senate District, Washington: Democratic loyalist district. In 2024, voted D+17%. Democratic peak: D+17 in 2020.
Key facts
- 2024 presidential margin
- D+17MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 157,0542024 5-year
- Median household income
- $103,0582024 5-year
- White (non-Hispanic)
- 62.7%2024 5-year
- Black
- 7.3%2024 5-year
- Hispanic / Latino
- 12.6%2024 5-year
- Peak Democratic margin
- D+17 in 2008MIT Election Lab
Constituent county margins for Legislative (Senate) District 31, 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 | 42,125 | 29,765 | 74,683 | ||
| D | 44,921 | 31,313 | 79,008 | ||
| D | 31,930 | 23,409 | 62,143 | ||
| D | 33,470 | 24,213 | 59,412 | ||
| D | 32,612 | 23,073 | 57,001 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
14.4%
English
11.1%
Irish
10.0%
American
3.5%
Italian
3.4%
Scottish
2.6%
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: 37.1 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
$103,058
Legislative (Senate) District 31 ranks near the middle of US counties.
Legislative (Senate) District 31$103,058
Washington$98,141
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.8%
Child poverty is below the national average.
Children under 1810.1%
Working age (18–64)8.3%
Seniors (65+)9.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
81.6%
speak English only
Asian & Pacific Islander6.7%
Spanish6.6%
Other Indo-European3.8%
Other languages1.3%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 56.2% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of D+45.1, this district ranks among the most lopsided in the state, reflecting a dense, urban electorate that has delivered consistent supermajority-level support for Democratic presidential candidates.
The Democratic margin in Washington 31st State Senate District reached its widest at seventeen points in 2020. The margin in 2024 was seventeen points — still decisive.
Its loyalty is rooted in its place. Median household income of $103,058, a 63% non-Hispanic-white share, and a population of 157,054 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 31, Washington — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/sld-upper/53031/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Legislative (Senate) District 31, Washington vote in 2024?
In 2024, Legislative (Senate) District 31, Washington voted Democratic by 16.5 points (D+17), carried by the Democratic candidate. Out of 74,683 votes cast, 42,125 went Democratic and 29,765 went Republican.
What is Legislative (Senate) District 31, Washington's political archetype?
Akashic classifies Legislative (Senate) District 31, 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 31, Washington?
Legislative (Senate) District 31, Washington has a population of 157,054 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 31, Washington?
Median household income in Legislative (Senate) District 31, Washington is $103,058 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Legislative (Senate) District 31, Washington?
Akashic tracks 5 presidential elections in Legislative (Senate) District 31, 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.