Legislative (Senate) District 31 State Senate District (WA) — Elections 1876–2024

Washington 31st State Senate District, Washington: Democratic loyalist district. In 2024, voted D+16%. Republican peak: R+54 in 1904.

Key facts

2024 presidential margin: D+16MIT Election Lab
Political archetype: Democratic loyalistAkashic typology
Population: 327,0992024 5-year
Median household income: $102,4422024 5-year
White (non-Hispanic): 62.9%2024 5-year
Black: 7.3%2024 5-year
Hispanic / Latino: 12.6%2024 5-year
Peak Democratic margin: D+43 in 1936MIT Election Lab
Peak Republican margin: R+54 in 1904MIT Election Lab

2024 results by constituent county

2 counties · 2 D · 0 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	D	+15.5%	86,844	62,729	155,370
2020	D	+16.2%	92,529	65,976	164,308
2016	D	+12.6%	65,471	49,260	128,925
2012	D	+14.8%	68,975	50,741	123,305
2008	D	+16.0%	67,218	48,364	117,688
2004	D	+6.1%	58,761	51,877	112,344
2000	D	+9.8%	50,844	41,346	96,729
1996	D	+14.9%	44,477	31,613	86,564
1992	D	+12.1%	38,231	27,588	87,823
1988	D	+2.5%	35,825	34,074	71,169
1984	R	−15.4%	29,638	40,594	71,208
1980	R	−13.4%	23,911	32,559	64,777
1976	D	+1.0%	28,430	27,819	58,553
1972	R	−18.1%	21,203	31,124	54,767
1968	D	+13.4%	26,283	19,588	50,027
1964	D	+32.9%	30,719	15,410	46,595
1960	D	+4.3%	23,434	21,473	45,657
1956	R	−1.3%	20,714	21,265	42,295
1952	R	−1.7%	20,187	20,877	41,519
1948	D	+16.0%	18,123	12,853	33,039
1944	D	+23.8%	19,291	11,789	31,581
1940	D	+29.0%	18,430	10,028	28,962
1936	D	+42.6%	17,521	6,796	25,198
1932	D	+29.1%	13,752	6,954	23,352
1928	R	−33.9%	6,181	12,706	19,259
1924	R	−39.3%	1,439	7,645	15,803
1920	R	−33.2%	2,856	7,824	14,983
1916	D	+6.5%	6,754	5,862	13,638
1912	O	+1.6%	2,463	2,284	11,024
1908	R	−31.9%	1,776	3,770	6,251
1904	R	−53.5%	818	3,377	4,783
1900	R	−23.3%	1,280	2,119	3,605
1896	D	+8.9%	1,861	1,553	3,442
1892	R	−3.6%	1,209	1,338	3,563
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

14.5%

English

11.1%

Irish

10.0%

American

3.6%

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: 37.0 in this county, 39.1 nationally

Male

Age

Female

0.5%

85+

0.9%

1.9%

75–84

2.4%

4.3%

65–74

4.8%

5.8%

55–64

6.0%

45–54

5.9%

7.4%

35–44

7.3%

8.1%

25–34

7.5%

4.6%

18–24

4.0%

8.5%

5–17

8.2%

3.1%

2.9%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$102,442

Legislative (Senate) District 31 ranks near the middle of US counties.

Legislative (Senate) District 31$102,442

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

82.0%

speak English only

Spanish6.6%

Asian & Pacific Islander6.5%

Other Indo-European3.7%

Other languages1.2%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Other Christian

21.8%

Catholic & Orthodox

9.2%

Non-Christian

4.5%

Pentecostal & Holiness

4.2%

Mainline Protestant

2.6%

Baptist

1.1%

Methodist

0.5%

Source · 2020 US Religion Census. Remaining 56.0% 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 forty-three points in 1936. The margin in 2024 was sixteen points — still decisive.

Its loyalty is rooted in its place. Median household income of $102,442, a 63% non-Hispanic-white share, and a population of 327,099 together describe a district whose political habits are deeply settled.

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Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

Legislative (Senate) District 31, Washington. Akashic. https://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 15.5 points (D+16), carried by the Democratic candidate. Out of 155,370 votes cast, 86,844 went Democratic and 62,729 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 38 elections in the dataset, the district has voted Democratic 21 times, Republican 12 times, and other 1 times.

When did Legislative (Senate) District 31, Washington last vote Republican?

The most recent presidential election in which Legislative (Senate) District 31, Washington voted Republican was 1984.

How many people live in Legislative (Senate) District 31, Washington?

Legislative (Senate) District 31, Washington has a population of 327,099 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 $102,442 — 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 38 presidential elections in Legislative (Senate) District 31, Washington from 1876 to 2024. Of those, 21 went Democratic and 12 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.

Washington 31st State Senate District has voted Democratic in ten straight presidential cycles.

Key facts

Demographics

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Frequently asked questions