Jefferson County, Washington: Realigning Affluent Suburb county. In 2024, voted D+45%. Republican peak: R+52 in 1904.
Key facts
- 2024 presidential margin
- D+45MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 33,5772024 5-year
- Median household income
- $74,0482024 5-year
- White (non-Hispanic)
- 85.6%2024 5-year
- Black
- 0.4%2024 5-year
- Hispanic / Latino
- 4.4%2024 5-year
- Peak Democratic margin
- D+45 in 2024MIT Election Lab
- Peak Republican margin
- R+52 in 1904MIT Election Lab
- Most similar
- Tompkins County, NY · similarity 1.00
2024 results by precinct
2024 precinct map of Jefferson CountyPrecinct-level 2024 presidential results for Jefferson 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 | +4.0% |
| 1896 | −13.4% |
| 1900 | −26.4% |
| 1904 | −52.0% |
| 1908 | −32.5% |
| 1912 | +0.3% |
| 1916 | −11.0% |
| 1920 | −44.0% |
| 1924 | −43.7% |
| 1928 | −28.7% |
| 1932 | +31.9% |
| 1936 | +35.5% |
| 1940 | +14.9% |
| 1944 | +12.7% |
| 1948 | +8.2% |
| 1952 | −9.8% |
| 1956 | −13.6% |
| 1960 | +2.2% |
| 1964 | +35.5% |
| 1968 | +9.4% |
| 1972 | −13.0% |
| 1976 | +2.0% |
| 1980 | −4.5% |
| 1984 | +0.6% |
| 1988 | +11.3% |
| 1992 | +20.7% |
| 1996 | +18.0% |
| 2000 | +13.8% |
| 2004 | +26.6% |
| 2008 | +34.6% |
| 2012 | +31.7% |
| 2016 | +31.7% |
| 2020 | +41.4% |
| 2024 | +45.1% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 17,459 | 6,324 | 24,698 | ||
| D | 17,204 | 6,931 | 24,792 | ||
| D | 12,656 | 6,037 | 20,879 | ||
| D | 12,739 | 6,405 | 19,961 | ||
| D | 13,252 | 6,330 | 19,991 | ||
| D | 11,610 | 6,650 | 18,650 | ||
| D | 8,281 | 6,095 | 15,833 | ||
| D | 7,145 | 4,607 | 14,119 | ||
| D | 6,148 | 3,467 | 12,942 | ||
| D | 5,270 | 4,184 | 9,636 | ||
| D | 4,602 | 4,543 | 9,334 | ||
| R | 3,279 | 3,645 | 8,170 | ||
| D | 2,913 | 2,794 | 6,092 | ||
| R | 2,096 | 2,770 | 5,179 | ||
| D | 2,251 | 1,827 | 4,505 | ||
| D | 3,012 | 1,432 | 4,456 | ||
| D | 2,197 | 2,103 | 4,307 | ||
| R | 1,750 | 2,300 | 4,057 | ||
| R | 1,933 | 2,355 | 4,305 | ||
| D | 1,911 | 1,610 | 3,676 | ||
| D | 1,829 | 1,415 | 3,262 | ||
| D | 2,083 | 1,540 | 3,655 | ||
| D | 2,279 | 1,063 | 3,425 | ||
| D | 1,994 | 952 | 3,267 | ||
| R | 810 | 1,472 | 2,306 | ||
| R | 143 | 913 | 1,763 | ||
| R | 322 | 1,128 | 1,832 | ||
| R | 861 | 1,094 | 2,112 | ||
| O | 642 | 636 | 2,326 | ||
| R | 417 | 859 | 1,360 | ||
| R | 283 | 962 | 1,307 | ||
| R | 392 | 684 | 1,108 | ||
| R | 536 | 704 | 1,250 | ||
| D | 665 | 610 | 1,391 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
19.8%
German
17.0%
Irish
15.9%
Scottish
5.1%
Italian
4.7%
American
3.9%
French
3.4%
Sample size too small to break out by ancestry reliably.
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: 59.8 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
$74,048
Jefferson County ranks near the middle of US counties.
Jefferson County$74,048
Washington$98,141
United States$80,734
Jefferson County ranks near the middle 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
11.1%
Child poverty is below the national average.
Children under 1813.7%
Working age (18–64)10.9%
Seniors (65+)10.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
93.8%
speak English only
Spanish2.7%
Other Indo-European1.9%
Asian & Pacific Islander1.3%
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 79.3% of residents not counted as adherents by any reporting body.
Jefferson County's small, highly educated coastal population on the Olympic Peninsula consistently produces some of the widest Democratic presidential margins in Washington state, reaching D+45 in 2024.
Once reliably Republican — a margin of fifty-two points in 1904 at its widest — Jefferson County has trended Democratic. Between 2020 and 2024 the county moved four points toward the Democratic candidate; the 2024 margin was forty-five points.
A median household income of $74,048 — among the higher at this geographic scale — and a population of 33,577 describe the county. The county's voting pattern over the last decade is most similar to that of Tompkins County and San Juan 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.
Jefferson County, Washington. Akashic. https://akashic.app/county/53031/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Jefferson County, Washington vote in 2024?
In 2024, Jefferson County, Washington voted Democratic by 45.1 points (D+45), carried by the Democratic candidate. Out of 24,698 votes cast, 17,459 went Democratic and 6,324 went Republican.
What is Jefferson County, Washington's political typology?
Akashic places Jefferson 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 21 times, Republican 12 times, and other 1 times.
When did Jefferson County, Washington last vote Republican?
The most recent presidential election in which Jefferson County, Washington voted Republican was 1980.
How many people live in Jefferson County, Washington?
Jefferson County, Washington has a population of 33,577 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Washington?
Median household income in Jefferson County, Washington is $74,048 — below the national median of $80,734. The Washington state median is $98,141.
What is the political history of Jefferson County, Washington?
Akashic tracks 38 presidential elections in Jefferson County, Washington from 1876 to 2024. Of those, 21 went Democratic and 12 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.