Washington County, Oregon Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 2nd-largest in Oregon

The population of Washington County, Oregon is 600,266 as of the 2023 American Community Survey, making it the 2nd-largest county in Oregon. The median household income is $104,434, the median home value is $558,500, and the median age is 37.8.

The population of Washington County has grown 15.0% since 2010 (531,652 → 611,272), a +1.00% annualized rate.

Washington County within Oregon · Source: US Census TIGER/Line via us-atlas

600,266

Population

+1.00%

Annual growth

829

People / sq mi

$104,434

Median Income

$558,500

Median Home Value

Washington County covers 724 sq mi of land at 828.8 people per square mile.

About Washington County, OR

Washington County is a county in Oregon with a population of 600,266. It ranks #2 among counties in Oregon by population. The median age is 37.8, in line with the national median. The population is 49.9% male and 50.1% female.

The median household income in Washington County is $104,434, above the US median of $74,580. 5.0% of residents live below the federal poverty level. Home values sit at a median of $558,500, with monthly rent averaging $1,773. The homeownership rate of 60.9% is lower than the national rate of 64.8%.

Educational attainment in Washington County reflects 46.7% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 21.7% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 24.1 minutes each way.

Washington County Population History (2010-2024)

The county of Washington County had a population of 531,652 in 2010 and 611,272 in 2024, a 15.0% growth over 14 years. The peak was 611,272 in 2024. Average annual growth rate: 1.00%.

611,272

Population (2024)

531,652

Population (2010)

611,272

Peak (2024)

1.00%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	531,652	-	-	estimate
2011	541,041	+9,389	+1.77%	estimate
2012	548,651	+7,610	+1.41%	estimate
2013	555,443	+6,792	+1.24%	estimate
2014	562,552	+7,109	+1.28%	estimate
2015	572,955	+10,403	+1.85%	estimate
2016	585,358	+12,403	+2.16%	estimate
2017	591,969	+6,611	+1.13%	estimate
2018	597,030	+5,061	+0.85%	estimate
2019	600,933	+3,903	+0.65%	estimate
2020	601,045	+112	+0.02%	estimate
2021	602,356	+1,311	+0.22%	estimate
2022	600,229	-2,127	-0.35%	estimate
2023	604,831	+4,602	+0.77%	estimate
2024	611,272	+6,441	+1.06%	estimate

Race & Ethnicity

White	66.0%
Black or African American	2.3%
Asian	0.0%
Hispanic or Latino (any race)	2.6%
Two or More Races	0.2%

Age & Sex

37.8

Median Age

50.1%

Female

49.9%

Male

14.3%

Age 65+

Age Distribution

Under 5

5.4%

5–9

5.7%

10–14

6.9%

15–19

6.1%

20–24

5.8%

25–34

15.6%

35–44

15.5%

45–54

13.3%

55–59

5.6%

60–64

5.7%

65–74

8.7%

75–84

4.0%

85+

1.6%

Children (under 15): 18.0% · Seniors (65+): 14.3%

Income & Poverty

Median household income	$104,434+$24,008 vs state
Mean household income	$133,965
Per-capita income	$52,136
Poverty rate	5.0%-2.3% vs state
Unemployment rate	3.1%
Employment-to-population	65.5%

Top Industries by Employment

Professional & business services

19.9%

Manufacturing

17.6%

Finance & real estate

14.4%

Education & health care

7.9%

Information

6.3%

Construction

5.7%

Retail trade

4.2%

Arts, entertainment & food

4.0%

The largest employment sector in Washington County is professional & business services, accounting for 19.9% of workers.

How residents commute

3.6%

Drive alone

2.3%

Carpool

63.4%

Public transit

21.7%

Work from home

24.1 min

Avg commute

Housing

$558,500+$104,300 vs state

Median home value

$1,773

Median rent

60.9%

Homeownership rate

240,409

Total housing units

96.7%

Occupied

3.3%

Vacant

39.1%

Renter-occupied

Social & access

94.6%

With health insurance

97.9%

With broadband internet

39.4%

Foreign-born

5.7%

Veterans (18+)

11.0%

With a disability

74.9%

Speak language other than English at home

Education

92.9%

High School+

46.7%

Bachelor's+

Largest cities in Oregon

Portland (642,715)Eugene (177,520)Salem (176,666)Gresham (112,818)Hillsboro (107,050)Bend (101,472)Beaverton (97,502)Medford (85,794)Springfield (61,642)Corvallis (60,424)All Oregon cities →

Other counties in Oregon

Multnomah County (803,863)Clackamas County (422,308)Lane County (382,628)Marion County (346,532)Jackson County (222,563)Deschutes County (203,026)Linn County (129,794)Douglas County (111,807)Yamhill County (108,122)Benton County (96,359)All Oregon counties →

Part of Oregon

Oregon demographic profile All Oregon data →

Metro areas in Oregon

Portland (2,510,529)Salem (435,085)Eugene (382,628)Bend (253,650)Medford (222,563)Albany (129,794)Corvallis (96,359)Grants Pass (88,069)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Common questions about Washington County, OR

What is the population of Washington County, OR?What is the median household income in Washington County, OR?What is the median home value in Washington County, OR?What are the demographics of Washington County, OR?What is the cost of living in Washington County, OR?Is Washington County, OR growing?

Frequently Asked Questions

Washington County, Oregon has a population of 600,266 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 2nd-largest county in Oregon. Population density is 829 people per square mile.

The population of Washington County has grown 15.0% since 2010 (531,652 → 611,272), a +1.00% annualized rate.

The median household income in Washington County, Oregon is $104,434, with mean (average) household income of $133,965 and per-capita income of $52,136. 5.0% of residents live below the federal poverty level.

In Washington County, the largest racial and ethnic groups are White (66.0%), Hispanic or Latino (2.6%), Black or African American (2.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Washington County, Oregon is 37.8 years. Residents are 50.1% female and 49.9% male.

The median home value in Washington County is $558,500 and median monthly rent is $1,773. 60.9% of occupied housing units are owner-occupied. The county has 240,409 total housing units, 3.3% of which are vacant.

The largest employment sector in Washington County, Oregon is professional, scientific, and management services, employing 19.9% of workers. The unemployment rate is 3.1%.

Portland is among the largest cities associated with Washington County, Oregon, with a population of 642,715.