Washington 15th State Senate District, Washington: Republican loyalist district. In 2024, voted R+15%. Republican peak: R+15 in 2024.
Key facts
- 2024 presidential margin
- R+15MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 156,7952024 5-year
- Median household income
- $72,2222024 5-year
- White (non-Hispanic)
- 48.7%2024 5-year
- Black
- 0.8%2024 5-year
- Hispanic / Latino
- 50.2%2024 5-year
- Peak Republican margin
- R+15 in 2024MIT Election Lab
Constituent county margins for Legislative (Senate) District 15, 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 |
|---|---|---|---|---|---|
| R | 22,817 | 31,222 | 55,747 | ||
| R | 26,505 | 31,936 | 60,056 | ||
| R | 19,106 | 26,206 | 49,675 | ||
| R | 20,292 | 26,624 | 48,221 | ||
| R | 20,503 | 26,213 | 47,824 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
10.1%
English
7.3%
Irish
5.7%
American
5.1%
French
1.7%
Italian
1.5%
Scottish
1.2%
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: 33.5 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
$72,222
Legislative (Senate) District 15 ranks near the middle of US counties.
Legislative (Senate) District 15$72,222
Washington$98,141
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
15.1%
Children face moderate poverty.
Children under 1819.8%
Working age (18–64)13.1%
Seniors (65+)14.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
59.4%
speak English only
Spanish38.4%
Asian & Pacific Islander0.9%
Other Indo-European0.7%
Other languages0.6%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 52.8% 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 fifteen points in 2024. The margin in 2024 was fifteen points, in line with the district's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $72,222, a 49% non-Hispanic-white share, and a population of 156,795 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 15, Washington — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.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 15.1 points (R+15), carried by the Republican candidate. Out of 55,747 votes cast, 22,817 went Democratic and 31,222 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 5 elections in the dataset, the district has voted Democratic 0 times, Republican 5 times, and other 0 times.
How many people live in Legislative (Senate) District 15, Washington?
Legislative (Senate) District 15, Washington has a population of 156,795 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 $72,222 — 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 5 presidential elections in Legislative (Senate) District 15, Washington from 2008 to 2024. Of those, 0 went Democratic and 5 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.