Legislative (Senate) District 15 State Senate District (WA) — Elections 1876–2024

Washington 15th State Senate District, Washington: Republican loyalist district. In 2024, voted R+16%. Republican peak: R+52 in 1924.

Key facts

2024 presidential margin: R+16MIT Election Lab
Political archetype: Republican loyalistAkashic typology
Population: 148,5972024 5-year
Median household income: $73,7092024 5-year
White (non-Hispanic): 50.4%2024 5-year
Black: 0.9%2024 5-year
Hispanic / Latino: 48.1%2024 5-year
Peak Democratic margin: D+15 in 1936MIT Election Lab
Peak Republican margin: R+52 in 1904MIT Election Lab

2024 results by constituent county

2 counties · 0 D · 2 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	R	−15.8%	22,017	30,599	54,302
2020	R	−10.3%	25,279	31,266	58,179
2016	R	−15.4%	18,132	25,518	48,027
2012	R	−14.5%	19,266	26,014	46,566
2008	R	−13.3%	19,340	25,416	45,541
2004	R	−22.8%	16,229	25,989	42,797
2000	R	−22.5%	14,580	23,450	39,380
1996	R	−4.7%	14,784	16,405	34,818
1992	R	−9.0%	12,045	15,097	34,009
1988	R	−15.6%	12,930	17,775	31,084
1984	R	−26.3%	13,546	23,354	37,339
1980	R	−22.2%	11,913	19,621	34,697
1976	R	−12.2%	13,027	16,782	30,810
1972	R	−23.5%	10,679	17,724	29,955
1968	R	−15.3%	10,684	14,986	28,054
1964	D	+13.4%	16,235	12,374	28,776
1960	R	−16.7%	12,061	16,930	29,166
1956	R	−19.4%	11,507	17,077	28,657
1952	R	−27.7%	9,674	17,195	27,111
1948	R	−2.3%	10,542	11,049	21,998
1944	R	−13.3%	8,073	10,574	18,772
1940	R	−5.9%	9,062	10,211	19,410
1936	D	+14.8%	8,627	6,281	15,889
1932	D	+10.6%	7,039	5,608	13,559
1928	R	−46.6%	3,040	8,408	11,526
1924	R	−51.6%	1,097	6,094	9,692
1920	R	−38.0%	2,082	5,846	9,897
1916	R	−7.0%	3,132	3,656	7,472
1912	O	+0.1%	1,697	1,687	6,792
1908	R	−37.0%	854	2,042	3,214
1904	R	−51.6%	452	1,693	2,407
1900	R	−16.4%	518	733	1,310
1896	D	+14.2%	615	461	1,082
1892	R	−8.5%	242	304	733
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

10.6%

English

7.9%

Irish

6.1%

American

5.1%

French

1.7%

Italian

1.5%

Scottish

1.4%

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: 33.8 in this county, 39.1 nationally

Male

Age

Female

0.8%

85+

1.0%

1.8%

75–84

2.3%

4.2%

65–74

4.5%

5.3%

55–64

5.3%

5.4%

45–54

5.3%

6.3%

35–44

6.0%

6.8%

25–34

6.7%

4.8%

18–24

4.6%

11.0%

5–17

10.5%

3.5%

3.4%

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

Median household income

2024 inflation-adjusted dollars

$73,709

Legislative (Senate) District 15 ranks near the middle of US counties.

Legislative (Senate) District 15$73,709

Washington$98,141

United States$80,734

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

Poverty rate

All persons below federal poverty line

14.8%

Children face moderate poverty.

Children under 1819.3%

Working age (18–64)12.9%

Seniors (65+)13.8%

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

Language at home

Population aged 5 and older

61.0%

speak English only

Spanish36.6%

Asian & Pacific Islander1.0%

Other Indo-European0.9%

Other languages0.6%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

22.1%

Other Christian

16.7%

Pentecostal & Holiness

4.8%

Mainline Protestant

1.5%

Baptist

1.0%

Non-Christian

0.9%

Methodist

0.7%

Source · 2020 US Religion Census. Remaining 52.3% of residents not counted as adherents by any reporting body.

Washington's 15th Senate District posted a nearly 20-point Republican presidential margin in 2024, reflecting its mix of small agricultural communities and exurban growth east of Tacoma that has long leaned solidly conservative.

The Republican margin in Washington 15th State Senate District reached its widest at fifty-two points in 1924. The margin in 2024 was sixteen points, in line with the district's deep historical pattern.

Its loyalty is rooted in its place. Median household income of $73,709, a 50% non-Hispanic-white share, and a population of 148,597 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 15, Washington. Akashic. https://akashic.app/sld-upper/53015/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did Legislative (Senate) District 15, Washington vote in 2024?

In 2024, Legislative (Senate) District 15, Washington voted Republican by 15.8 points (R+16), carried by the Republican candidate. Out of 54,302 votes cast, 22,017 went Democratic and 30,599 went Republican.

What is Legislative (Senate) District 15, Washington's political archetype?

Akashic classifies Legislative (Senate) District 15, Washington as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 4 times, Republican 29 times, and other 1 times.

When did Legislative (Senate) District 15, Washington last vote Democratic?

The most recent presidential election in which Legislative (Senate) District 15, Washington voted Democratic was 1964.

How many people live in Legislative (Senate) District 15, Washington?

Legislative (Senate) District 15, Washington has a population of 148,597 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 15, Washington?

Median household income in Legislative (Senate) District 15, Washington is $73,709 — below the national median of $80,734. The Washington state median is $98,141.

What is the political history of Legislative (Senate) District 15, Washington?

Akashic tracks 38 presidential elections in Legislative (Senate) District 15, Washington from 1876 to 2024. Of those, 4 went Democratic and 29 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.

Washington 15th State Senate District has voted Republican in fifteen straight presidential cycles.

Key facts

Demographics

Compare two places, side by side

Frequently asked questions