San Juan County, Washington

2024 results by precinct

23 precincts · 13,006 votes cast

Harris · D+51

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+51.1%	9,539	2,890	13,006
2020	D	+50.5%	9,725	3,057	13,197
2016	D	+40.3%	7,172	2,688	11,134
2012	D	+37.5%	7,125	3,111	10,692
2008	D	+41.9%	7,374	2,958	10,531
2004	D	+32.7%	6,589	3,290	10,104
2000	D	+16.9%	4,426	3,005	8,424
1996	D	+15.5%	3,663	2,523	7,354
1992	D	+20.4%	3,353	1,901	7,117
1988	D	+6.0%	3,008	2,660	5,814
1984	R	−7.0%	2,514	2,900	5,526
1980	R	−13.9%	1,666	2,363	5,031
1976	R	−14.3%	1,467	1,998	3,722
1972	R	−31.5%	906	1,786	2,795
1968	R	−24.4%	685	1,164	1,963
1964	D	+3.8%	906	839	1,750
1960	R	−28.0%	624	1,112	1,740
1956	R	−30.8%	584	1,105	1,693
1952	R	−29.1%	619	1,133	1,766
1948	R	−15.6%	636	881	1,575
1944	R	−4.4%	644	703	1,354
1940	D	+3.1%	860	808	1,675
1936	D	+5.3%	775	690	1,595
1932	D	+11.9%	786	607	1,501
1928	R	−33.9%	400	814	1,220
1924	R	−59.0%	86	744	1,116
1920	R	−51.0%	196	833	1,250
1916	D	+5.6%	669	591	1,395
1912	R	−2.4%	311	341	1,239
1908	R	−45.7%	178	581	881
1904	R	−57.3%	113	554	770
1900	R	−26.3%	245	428	696
1896	R	−17.0%	291	411	705
1892	R	−19.2%	226	348	634
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

1.5%

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: 57.0 in this county, 39.1 nationally

Male

Age

Female

1.3%

85+

1.6%

6.0%

75–84

5.8%

10.3%

65–74

11.1%

7.8%

55–64

8.6%

6.1%

45–54

5.5%

5.0%

35–44

5.8%

4.2%

25–34

4.0%

2.1%

18–24

2.3%

5.3%

5–17

4.7%

1.3%

1.2%

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

Median household income

2024 inflation-adjusted dollars

$84,800

San Juan County ranks in the top 25% of US counties.

San Juan County$84,800

Washington$98,141

United States$80,734

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

Poverty rate

All persons below federal poverty line

11.3%

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

Other Christian

12.1%

Catholic & Orthodox

6.9%

Mainline Protestant

3.8%

Non-Christian

0.8%

Pentecostal & Holiness

0.1%

Source · 2020 US Religion Census. Remaining 76.3% of residents not counted as adherents by any reporting body.

San Juan County, reachable only by ferry or small plane, combines a tiny year-round population with a heavily educated, affluent resident base that has produced some of the most lopsided presidential margins in the Pacific Northwest.

The unraveling was not abrupt. The Democratic margin in San Juan County peaked at fifty-one points in 2024; it narrowed steadily over the late twentieth century. The 1988 election delivered the county to the Republican party for the first time in many years, by a margin of six points. By 2024, the margin had widened further.

The economic and demographic context is severe. San Juan County's median household income of $84,800 is among the lowest of any county in the United States; 11% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Boulder County and Charlottesville city.

Most similar counties

For forty years, San Juan County voted Republican. Then it stopped.