Jefferson County, Washington

2024 results by precinct

37 precincts · 24,698 votes cast

Harris · D+45

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+45.1%	17,459	6,324	24,698
2020	D	+41.4%	17,204	6,931	24,792
2016	D	+31.7%	12,656	6,037	20,879
2012	D	+31.7%	12,739	6,405	19,961
2008	D	+34.6%	13,252	6,330	19,991
2004	D	+26.6%	11,610	6,650	18,650
2000	D	+13.8%	8,281	6,095	15,833
1996	D	+18.0%	7,145	4,607	14,119
1992	D	+20.7%	6,148	3,467	12,942
1988	D	+11.3%	5,270	4,184	9,636
1984	D	+0.6%	4,602	4,543	9,334
1980	R	−4.5%	3,279	3,645	8,170
1976	D	+2.0%	2,913	2,794	6,092
1972	R	−13.0%	2,096	2,770	5,179
1968	D	+9.4%	2,251	1,827	4,505
1964	D	+35.5%	3,012	1,432	4,456
1960	D	+2.2%	2,197	2,103	4,307
1956	R	−13.6%	1,750	2,300	4,057
1952	R	−9.8%	1,933	2,355	4,305
1948	D	+8.2%	1,911	1,610	3,676
1944	D	+12.7%	1,829	1,415	3,262
1940	D	+14.9%	2,083	1,540	3,655
1936	D	+35.5%	2,279	1,063	3,425
1932	D	+31.9%	1,994	952	3,267
1928	R	−28.7%	810	1,472	2,306
1924	R	−43.7%	143	913	1,763
1920	R	−44.0%	322	1,128	1,832
1916	R	−11.0%	861	1,094	2,112
1912	D	+0.3%	642	636	2,326
1908	R	−32.5%	417	859	1,360
1904	R	−52.0%	283	962	1,307
1900	R	−26.4%	392	684	1,108
1896	R	−13.4%	536	704	1,250
1892	D	+4.0%	665	610	1,391
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.

American

100.0%

Irish

1.0%

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. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 59.8 in this county, 39.1 nationally

Male

Age

Female

1.8%

85+

1.8%

6.1%

75–84

6.6%

11.2%

65–74

13.3%

7.6%

55–64

8.8%

5.1%

45–54

5.0%

4.9%

35–44

5.2%

4.1%

25–34

3.7%

2.1%

18–24

1.7%

4.5%

5–17

4.2%

1.4%

1.0%

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

Median household income

2024 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

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

Poverty rate

All persons below federal poverty line

11.1%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

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

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

4.6%

Other Christian

4.0%

Non-Christian

3.5%

Baptist

3.0%

Mainline Protestant

2.7%

Methodist

1.5%

Pentecostal & Holiness

1.4%

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.

The Democratic margin in Jefferson County peaked at forty-five points in 2024. By 1984 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-five points, the most Democratic-leaning result in the county's modern history.

The economic context is the key. Jefferson County's median household income of $74,048 sits well below state and national norms, and 11% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Tompkins County and San Juan County.

Most similar counties

Jefferson County was solidly one party for decades. In the last twenty years, it flipped.