Island County, Washington: Realigning Affluent Suburb county. In 2024, voted D+16%. Republican peak: R+58 in 1904.
Key facts
- 2024 presidential margin
- D+16MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 86,8362024 5-year
- Median household income
- $90,5512024 5-year
- White (non-Hispanic)
- 77.7%2024 5-year
- Black
- 2.3%2024 5-year
- Hispanic / Latino
- 8.7%2024 5-year
- Peak Democratic margin
- D+27 in 1932MIT Election Lab
- Peak Republican margin
- R+58 in 1904MIT Election Lab
- Most similar
- Los Alamos County, NM · similarity 0.96
2024 results by precinct
2024 precinct map of Island CountyPrecinct-level 2024 presidential results for Island 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 | −8.6% |
| 1896 | −3.7% |
| 1900 | −33.3% |
| 1904 | −57.9% |
| 1908 | −33.4% |
| 1912 | −1.4% |
| 1916 | +2.8% |
| 1920 | −34.7% |
| 1924 | −39.9% |
| 1928 | −44.6% |
| 1932 | +26.8% |
| 1936 | +27.2% |
| 1940 | +8.3% |
| 1944 | +5.5% |
| 1948 | −3.0% |
| 1952 | −24.0% |
| 1956 | −22.7% |
| 1960 | −18.5% |
| 1964 | +12.9% |
| 1968 | −10.5% |
| 1972 | −39.5% |
| 1976 | −13.8% |
| 1980 | −29.7% |
| 1984 | −32.5% |
| 1988 | −18.9% |
| 1992 | +0.1% |
| 1996 | −0.8% |
| 2000 | −4.9% |
| 2004 | −4.0% |
| 2008 | +6.2% |
| 2012 | +4.4% |
| 2016 | +5.6% |
| 2020 | +12.0% |
| 2024 | +16.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 29,595 | 20,967 | 52,449 | ||
| D | 29,213 | 22,746 | 53,925 | ||
| D | 20,960 | 18,465 | 44,273 | ||
| D | 21,478 | 19,605 | 42,372 | ||
| D | 22,058 | 19,426 | 42,159 | ||
| R | 18,216 | 19,754 | 38,580 | ||
| R | 14,778 | 16,408 | 33,004 | ||
| R | 12,157 | 12,387 | 28,464 | ||
| D | 9,555 | 9,526 | 27,168 | ||
| R | 8,510 | 12,552 | 21,353 | ||
| R | 6,850 | 13,548 | 20,616 | ||
| R | 5,422 | 10,926 | 18,559 | ||
| R | 5,859 | 7,804 | 14,104 | ||
| R | 3,149 | 7,495 | 11,003 | ||
| R | 3,238 | 4,077 | 8,000 | ||
| D | 3,946 | 3,044 | 6,999 | ||
| R | 2,470 | 3,596 | 6,094 | ||
| R | 2,009 | 3,196 | 5,222 | ||
| R | 1,772 | 2,901 | 4,703 | ||
| R | 1,694 | 1,805 | 3,680 | ||
| D | 1,662 | 1,487 | 3,187 | ||
| D | 1,626 | 1,371 | 3,057 | ||
| D | 1,687 | 921 | 2,813 | ||
| D | 1,517 | 803 | 2,662 | ||
| R | 556 | 1,487 | 2,087 | ||
| O | 114 | 832 | 1,799 | ||
| R | 285 | 883 | 1,725 | ||
| D | 855 | 804 | 1,845 | ||
| O | 310 | 332 | 1,573 | ||
| R | 192 | 450 | 773 | ||
| R | 83 | 424 | 589 | ||
| R | 123 | 263 | 420 | ||
| R | 191 | 206 | 405 | ||
| R | 127 | 161 | 396 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
17.2%
English
16.2%
Irish
12.8%
Italian
4.0%
Scottish
3.9%
American
3.9%
French
3.0%
African American
1.8%
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: 44.8 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
$90,551
Island County ranks in the top 10% of US counties.
Island County$90,551
Washington$98,141
United States$80,734
Island County ranks in the top 10% 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
7.7%
Child poverty is below the national average.
Children under 188.5%
Working age (18–64)7.6%
Seniors (65+)7.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
90.6%
speak English only
Spanish3.9%
Asian & Pacific Islander3.6%
Other Indo-European1.6%
Other languages0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 44.3% of residents not counted as adherents by any reporting body.
Island County's two main islands host Naval Air Station Whidbey Island, yet the county returned a Democratic presidential margin of 16 points in 2024, suggesting its substantial military-connected population does not translate into the rightward lean seen in many base counties.
Once reliably Republican — a margin of fifty-eight points in 1904 at its widest — Island County has trended Democratic. Between 2020 and 2024 the county moved four points toward the Democratic candidate; the 2024 margin was sixteen points.
A median household income of $90,551 — among the higher at this geographic scale — and a population of 86,836 describe the county. The county's voting pattern over the last decade is most similar to that of Los Alamos County and Fayette County.
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.
Island County, Washington. Akashic. https://akashic.app/county/53029/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Island County, Washington vote in 2024?
In 2024, Island County, Washington voted Democratic by 16.5 points (D+16), carried by the Democratic candidate. Out of 52,449 votes cast, 29,595 went Democratic and 20,967 went Republican.
What is Island County, Washington's political typology?
Akashic places Island County, Washington in the "Realigning Affluent Suburb" typology — College-educated, affluent suburbs — the one bloc moving toward the Democratic Party. 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 12 times, Republican 20 times, and other 2 times.
When did Island County, Washington last vote Republican?
The most recent presidential election in which Island County, Washington voted Republican was 2004.
How many people live in Island County, Washington?
Island County, Washington has a population of 86,836 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Island County, Washington?
Median household income in Island County, Washington is $90,551 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Island County, Washington?
Akashic tracks 38 presidential elections in Island County, Washington from 1876 to 2024. Of those, 12 went Democratic and 20 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.