Demographics of Washington County, Oregon

Washington County, Oregon had 611,708 people on July 1, 2025, by the Census Bureau’s estimate: +10,704 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Washington County, in four figures

611,708
Population: July 1, 2025, Vintage 2025 estimate.; +1.8%
Change since July 2020: +10,704 people.; 38.1 ±0.2
Median age: ACS 2020–⁠2024.; $107,772 ±$1,788
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Washington County, Oregon's population grew 1.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Washington County, Oregon's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Washington County, Oregon's population grew 1.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Washington County, Oregon's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	601,004	100.0	100.0
2021	602,382	100.2	100.2
2022	600,063	99.8	100.7
2023	603,856	100.5	101.6
2024	608,613	101.3	102.5
2025	611,708	101.8	103.1

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Population of Washington County, Oregon on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	601,004	+636	+593	+78	−260
2021	602,382	+1,378	+1,995	+928	−2,115
2022	600,063	−2,319	+1,833	+2,521	−6,624
2023	603,856	+3,793	+1,695	+5,445	−3,284
2024	608,613	+4,757	+1,839	+6,085	−3,148
2025	611,708	+3,095	+1,776	+3,355	−2,070

Age, 2020–2024

The median age is 38.1 ±0.2: for men 37.3 ±0.2 and for women 38.9 ±0.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Washington County by age, ACS 2020–2024
Age	People	Share	Oregon	United States
Under 5	31,928 ±160	5.3% ±<0.1	4.9% ±<0.1	5.6% ±<0.1
5 to 17	98,297 ±1,781	16.3% ±0.3	15.0% ±0.1	16.3% ±<0.1
18 to 24	47,876 ±1,277	7.9% ±0.2	8.5% ±0.1	9.1% ±<0.1
25 to 44	188,871 ±2,051	31.3% ±0.3	28.0% ±0.1	26.9% ±<0.1
45 to 64	147,767 ±1,804	24.5% ±0.3	24.5% ±0.1	24.8% ±<0.1
65 and over	89,208 ±1,971	14.8% ±0.3	19.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $107,772 ±$1,788, and income per person $53,929 ±$899, in 2024 dollars. The median is $83,011 ±$573 in Oregon and $80,734 ±$166 in the United States.

Households by income

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Households in Washington County by income, ACS 2020–2024
Household income	Households	Share	Oregon	United States
Under $25,000	20,799 ±1,283	8.8% ±0.5	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	27,235 ±1,510	11.6% ±0.6	16.2% ±0.3	16.7% ±<0.1
$50,000 to $74,999	29,945 ±1,532	12.7% ±0.6	15.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	30,522 ±1,252	13.0% ±0.5	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	47,605 ±1,700	20.2% ±0.7	18.5% ±0.2	17.5% ±<0.1
$150,000 to $199,999	33,182 ±1,630	14.1% ±0.7	10.1% ±0.2	9.6% ±<0.1
$200,000 or more	46,118 ±1,636	19.6% ±0.7	12.7% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Washington County by age, ACS 2020–2024
Age	Below poverty	Rate	Oregon	United States
All ages	48,201 ±3,484	8.1% ±0.6	11.9% ±0.2	12.5% ±0.1
Under 18	11,137 ±1,202	8.6% ±0.9	13.2% ±0.4	16.1% ±0.1
18 to 59	26,440 ±1,969	7.6% ±0.6	12.0% ±0.2	11.6% ±0.1
60 and over	10,624 ±871	8.7% ±0.7	10.8% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Washington County, ACS 2020–2024
Measure	Washington County	Oregon	United States
Housing units	243,278 ±186	1,857,992 ±637	143,775,355 ±10,234
Occupied	96.8% ±0.4	92.5% ±0.2	89.9% ±0.1
Vacant	3.2% ±0.3	7.5% ±0.2	10.1% ±0.1
Owner occupied	60.8% ±0.8	63.3% ±0.4	65.2% ±0.3
Renter occupied	39.2% ±0.8	36.7% ±0.3	34.8% ±0.1
Median home value	$588,000 ±$4,727	$477,600 ±$1,400	$332,700 ±$236
Median gross rent	$1,849 ±$16	$1,525 ±$10	$1,413 ±$2
Median year built	1990 ±2	1981 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Washington County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Oregon	United States
Hispanic or Latino	112,182 ±0	18.6% ±<0.1	14.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	362,515 ±1,128	60.0% ±0.2	71.4% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	13,165 ±862	2.2% ±0.1	1.8% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	68,747 ±1,515	11.4% ±0.3	4.4% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1,554 ±296	0.3% ±<0.1	0.6% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	2,866 ±383	0.5% ±0.1	0.4% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	3,476 ±739	0.6% ±0.1	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	39,442 ±2,075	6.5% ±0.3	6.1% ±0.1	4.3% ±<0.1

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Washington County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Oregon	United States
Born in the state	246,410 ±3,294	40.8% ±0.5	45.6% ±0.2	57.3% ±<0.1
Born in another state	237,088 ±3,627	39.3% ±0.6	43.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	10,147 ±1,095	1.7% ±0.2	1.3% ±0.1	1.7% ±<0.1
Born abroad	110,302 ±2,952	18.3% ±0.5	9.8% ±0.2	14.1% ±<0.1
Naturalized citizens	55,034 ±2,115	9.1% ±0.4	4.9% ±0.1	7.4% ±<0.1
Not citizens	55,268 ±2,737	9.2% ±0.5	5.0% ±0.1	6.8% ±<0.1

Washington County among the counties of Oregon

2nd of 36 by population, July 2025. Every one is listed on the Oregon page.

Counties of Oregon near Washington County in population, July 2025
County	July 2025	Change since 2020
Multnomah County	795,391	−2.6%
Washington County	611,708	+1.8%
Clackamas County	426,280	+0.9%
Lane County	381,584	−0.7%
Marion County	355,777	+2.7%
Jackson County	221,795	−0.9%
Deschutes County	213,072	+6.8%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026