Sonoma County, California

2024 results by precinct

415 precincts · 251,465 votes cast

Harris · D+46

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+46.2%	179,600	63,426	251,465
2020	D	+51.5%	199,938	61,825	268,317
2016	D	+46.7%	160,435	51,408	233,303
2012	D	+45.7%	153,942	54,784	216,865
2008	D	+49.6%	168,888	55,127	229,351
2004	D	+36.3%	148,261	68,204	220,690
2000	D	+27.3%	117,295	63,529	197,006
1996	D	+26.0%	100,738	53,555	181,297
1992	D	+28.7%	104,334	47,619	197,691
1988	D	+14.6%	91,262	67,725	161,583
1984	R	−3.4%	71,295	76,447	149,657
1980	R	−12.0%	45,596	60,722	125,985
1976	R	−0.2%	50,353	50,555	105,952
1972	R	−13.2%	43,746	57,697	105,434
1968	R	−5.8%	33,587	38,088	78,059
1964	D	+23.1%	44,354	27,677	72,136
1960	R	−8.6%	29,147	34,641	64,032
1956	R	−24.0%	20,616	33,659	54,361
1952	R	−33.0%	17,046	34,088	51,717
1948	R	−15.1%	16,026	22,077	39,984
1944	R	−1.1%	15,949	16,309	32,369
1940	R	−4.9%	15,230	16,819	32,379
1936	D	+21.2%	17,273	11,185	28,706
1932	D	+25.4%	15,686	9,161	25,669
1928	R	−20.3%	8,506	12,891	21,591
1924	R	−45.6%	1,767	9,535	17,028
1920	R	−40.7%	4,070	10,377	15,512
1916	R	−7.0%	8,377	9,733	19,324
1912	D	+45.8%	6,500	0	14,199
1908	R	−23.9%	3,168	5,427	9,439
1904	R	−28.7%	2,816	5,269	8,548
1900	R	−10.7%	3,517	4,381	8,107
1896	R	−5.9%	3,595	4,053	7,816
1892	D	+6.3%	3,451	3,016	6,950
1888	D	+1.4%	3,394	3,293	7,011
1884	R	−1.6%	2,944	3,044	6,160
1880	D	+6.7%	2,628	2,290	5,040
1876	D	+8.9%	2,907	2,432	5,345

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

American

100.0%

African American

1.3%

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

Age distribution by sex

Median age: 42.9 in this county, 39.1 nationally

Male

Age

Female

0.9%

85+

1.6%

2.8%

75–84

3.4%

6.0%

65–74

6.9%

6.6%

55–64

7.1%

6.2%

45–54

6.1%

6.7%

35–44

6.6%

6.3%

25–34

6.0%

4.0%

18–24

3.9%

7.4%

5–17

7.0%

2.4%

2.3%

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

Median household income

2024 inflation-adjusted dollars

$104,674

Sonoma County ranks in the top 5% of US counties.

Sonoma County$104,674

California$99,122

United States$80,734

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

Poverty rate

All persons below federal poverty line

8.9%

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

23.9%

Other Christian

6.3%

Non-Christian

2.8%

Mainline Protestant

1.4%

Baptist

1.1%

Pentecostal & Holiness

0.6%

Methodist

0.4%

Source · 2020 US Religion Census. Remaining 63.5% of residents not counted as adherents by any reporting body.

Sonoma's blend of agricultural heritage and coastal-influenced professional demographics anchors one of California's most consistent Democratic strongholds, with presidential margins widening steadily over the past two decades.

The unraveling was not abrupt. The Democratic margin in Sonoma County peaked at fifty-one points in 2020; 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 fifteen points. By 2024, the margin had widened further.

The economic and demographic context is severe. Sonoma County's median household income of $104,674 is among the lowest of any county in the United States; 9% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Santa Cruz County and Marin County.

Most similar counties

For forty-four years, Sonoma County voted Republican. Then it stopped.