King County, Washington: New American county. In 2024, voted D+51%. Democratic peak: D+53 in 2020.
Key facts
- 2024 presidential margin
- D+51MIT Election Lab
- Political typology
- New AmericanAkashic typology
- Population
- 2,287,1712024 5-year
- Median household income
- $124,7462024 5-year
- White (non-Hispanic)
- 54.7%2024 5-year
- Black
- 6.6%2024 5-year
- Hispanic / Latino
- 11.0%2024 5-year
- Peak Democratic margin
- D+53 in 2020MIT Election Lab
- Peak Republican margin
- R+52 in 1904MIT Election Lab
- Most similar
- Richmond city, VA · similarity 1.00
2024 results by precinct
2024 precinct map of King CountyPrecinct-level 2024 presidential results for King County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −10.5% |
| 1896 | +9.2% |
| 1900 | −12.8% |
| 1904 | −52.3% |
| 1908 | −19.1% |
| 1912 | +6.3% |
| 1916 | +14.0% |
| 1920 | −38.5% |
| 1924 | −47.0% |
| 1928 | −33.9% |
| 1932 | +24.7% |
| 1936 | +34.3% |
| 1940 | +19.7% |
| 1944 | +16.3% |
| 1948 | +4.2% |
| 1952 | −9.4% |
| 1956 | −11.9% |
| 1960 | −3.5% |
| 1964 | +20.1% |
| 1968 | +1.1% |
| 1972 | −16.3% |
| 1976 | −5.6% |
| 1980 | −6.3% |
| 1984 | −5.4% |
| 1988 | +9.1% |
| 1992 | +22.9% |
| 1996 | +25.0% |
| 2000 | +25.6% |
| 2004 | +31.2% |
| 2008 | +42.1% |
| 2012 | +40.4% |
| 2016 | +48.8% |
| 2020 | +52.7% |
| 2024 | +51.3% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 832,606 | 252,193 | 1,130,502 | ||
| D | 907,310 | 269,167 | 1,210,507 | ||
| D | 718,322 | 216,339 | 1,028,450 | ||
| D | 668,004 | 275,700 | 972,021 | ||
| D | 648,230 | 259,716 | 922,032 | ||
| D | 580,378 | 301,043 | 894,728 | ||
| D | 476,700 | 273,171 | 794,196 | ||
| D | 417,846 | 232,811 | 741,104 | ||
| D | 391,050 | 212,986 | 778,593 | ||
| D | 349,663 | 290,574 | 648,957 | ||
| R | 298,620 | 332,987 | 639,261 | ||
| R | 235,046 | 272,567 | 600,157 | ||
| R | 248,743 | 279,382 | 550,119 | ||
| R | 212,509 | 298,707 | 529,694 | ||
| D | 223,469 | 218,457 | 474,935 | ||
| D | 268,216 | 177,598 | 450,640 | ||
| R | 208,756 | 224,150 | 440,810 | ||
| R | 167,443 | 213,504 | 386,223 | ||
| R | 165,583 | 200,507 | 371,771 | ||
| D | 143,295 | 131,039 | 291,635 | ||
| D | 165,308 | 118,719 | 286,604 | ||
| D | 143,134 | 95,504 | 241,803 | ||
| D | 138,597 | 66,544 | 210,045 | ||
| D | 108,738 | 63,346 | 184,031 | ||
| R | 46,604 | 96,263 | 146,678 | ||
| R | 7,404 | 60,438 | 112,940 | ||
| R | 17,369 | 58,584 | 107,124 | ||
| D | 52,362 | 38,959 | 95,708 | ||
| O | 20,088 | 15,579 | 71,309 | ||
| R | 14,644 | 22,297 | 39,993 | ||
| R | 5,266 | 20,434 | 29,029 | ||
| R | 7,804 | 10,218 | 18,832 | ||
| D | 7,733 | 6,413 | 14,305 | ||
| R | 4,974 | 6,520 | 14,762 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
12.0%
English
11.0%
Irish
8.6%
Italian
3.4%
American
2.5%
Scottish
2.3%
French
2.2%
African American
5.3%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
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.
2024 ACS
Age distribution by sex
Median age: 37.4 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.
2024 ACS
Median household income
Inflation-adjusted dollars
$124,746
King County ranks in the top 0.5% of US counties.
King County$124,746
Washington$98,141
United States$80,734
King County ranks in the top 0.5% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
8.6%
Child poverty is below the national average.
Children under 189.7%
Working age (18–64)8.2%
Seniors (65+)10.1%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
68.9%
speak English only
Asian & Pacific Islander13.3%
Other Indo-European7.8%
Spanish7.1%
Other languages2.9%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 61.0% of residents not counted as adherents by any reporting body.
With over 1.7 million residents anchored by a dense, highly educated urban core, King County consistently posts presidential margins exceeding 50 points, making it one of the most lopsided large counties in the country.
King County has leaned Democratic in recent presidential elections, reaching a Democratic margin of fifty-three points in 2020. Between 2020 and 2024 it moved one point toward the Republican candidate — part of the sharpest rightward shift recorded among any group of places in the country.
Its demographics describe the shift: a 55% non-Hispanic-white share, a median household income of $124,746, and a population of 2,287,171. The county's voting pattern over the last decade is most similar to that of Richmond city and Alexandria city.
Most similar counties
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.
King County, Washington. Akashic. https://akashic.app/county/53033/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did King County, Washington vote in 2024?
In 2024, King County, Washington voted Democratic by 51.3 points (D+51), carried by the Democratic candidate. Out of 1,130,502 votes cast, 832,606 went Democratic and 252,193 went Republican.
What is King County, Washington's political typology?
Akashic places King County, Washington in the "New American" typology — Communities where a large share of households speak a language other than English — multilingual, Democratic-leaning overall, yet the hardest-swinging bloc toward the Republican Party in 2024. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 19 times, Republican 14 times, and other 1 times.
When did King County, Washington last vote Republican?
The most recent presidential election in which King County, Washington voted Republican was 1984.
How many people live in King County, Washington?
King County, Washington has a population of 2,287,171 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in King County, Washington?
Median household income in King County, Washington is $124,746 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of King County, Washington?
Akashic tracks 38 presidential elections in King County, Washington from 1876 to 2024. Of those, 19 went Democratic and 14 went Republican. The county's typology — "New American" — captures where that record, its demographics, and its recent swing place it among American communities.