Washington County, Oregon

2024 results by precinct

155 precincts · 297,369 votes cast

Harris · D+34

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+33.7%	192,641	92,427	297,369
2020	D	+34.6%	209,940	99,073	320,326
2016	D	+26.0%	153,251	83,197	269,232
2012	D	+17.4%	135,291	93,974	237,023
2008	D	+22.1%	141,544	89,185	236,632
2004	D	+6.0%	121,140	107,223	231,308
2000	D	+2.5%	90,662	86,091	185,974
1996	D	+7.1%	76,619	65,221	159,755
1992	D	+6.2%	67,528	57,146	167,195
1988	R	−5.6%	59,837	67,018	129,211
1984	R	−25.9%	44,602	75,877	120,896
1980	R	−17.3%	37,915	57,165	111,355
1976	R	−19.3%	34,847	52,376	90,611
1972	R	−21.4%	27,890	43,958	75,238
1968	R	−18.7%	22,943	34,105	59,842
1964	D	+16.5%	29,081	20,813	50,181
1960	R	−17.8%	17,736	25,415	43,186
1956	R	−22.1%	14,027	22,001	36,028
1952	R	−28.7%	11,191	20,250	31,584
1948	R	−9.4%	9,424	11,455	21,589
1944	R	−1.3%	9,110	9,362	18,677
1940	D	+1.5%	8,626	8,367	17,103
1936	D	+33.0%	8,641	4,148	13,612
1932	D	+22.7%	6,824	4,201	11,573
1928	R	−26.5%	3,544	6,162	9,879
1924	R	−23.0%	2,103	4,203	9,141
1920	R	−35.1%	2,262	4,947	7,641
1916	R	−17.5%	3,363	4,888	8,703
1912	D	+3.6%	1,429	1,261	4,659
1908	R	−31.2%	1,153	2,319	3,743
1904	R	−57.5%	492	2,296	3,137
1900	R	−18.4%	1,114	1,655	2,948
1896	R	−13.9%	1,566	2,082	3,708
1892	R	−43.4%	293	1,587	2,979
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

0.5%

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

Age distribution by sex

Median age: 38.1 in this county, 39.1 nationally

Male

Age

Female

0.7%

85+

0.9%

1.8%

75–84

2.5%

4.1%

65–74

4.7%

5.5%

55–64

5.7%

6.7%

45–54

6.6%

8.0%

35–44

7.6%

8.0%

25–34

7.6%

4.0%

18–24

3.9%

8.3%

5–17

7.9%

2.7%

2.6%

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

Median household income

2024 inflation-adjusted dollars

$107,772

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

Washington County$107,772

Oregon$83,011

United States$80,734

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

Poverty rate

All persons below federal poverty line

8.1%

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

Other Christian

14.3%

Catholic & Orthodox

11.8%

Non-Christian

3.8%

Mainline Protestant

2.1%

Pentecostal & Holiness

1.6%

Methodist

0.5%

Baptist

0.3%

Source · 2020 US Religion Census. Remaining 65.6% of residents not counted as adherents by any reporting body.

Washington County has shifted from competitive terrain to a reliable Democratic stronghold over two decades, driven by rapid population growth in the Hillsboro–Beaverton tech corridor and an increasingly diverse, college-educated electorate.

The Democratic margin in Washington County has been steady. It reached its modern peak at thirty-five points in 2020; the 2024 margin was thirty-four points, still in line with the county's long pattern.

Washington County's political identity is inseparable from its demographic profile: a 64% non-Hispanic-white share, a median household income of $107,772, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Howard County and Santa Barbara County.

Most similar counties

Washington County is one of the bluest places in America.