Snohomish County, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Washington
The population of Snohomish County, Washington is 834,648 as of the 2023 American Community Survey, making it the 3rd-largest county in Washington. The median household income is $107,982, the median home value is $644,600, and the median age is 38.4.
The population of Snohomish County has grown 20.8% since 2010 (715,522 → 864,113), a +1.36% annualized rate.
834,648
Population
+1.36%
Annual growth
400
People / sq mi
$107,982
Median Income
$644,600
Median Home Value
Snohomish County covers 2,087 sq mi of land at 400.0 people per square mile.
About Snohomish County, WA
In Snohomish County, home values do the distinguishing — a median of $644,600. With 834,648 residents, Snohomish County is a county in Washington. It is the #3-largest of all counties in Washington nationally.
Households here are among the highest-earning of all US counties: median income is $107,982, above the US median of $78,538. Only 5.2% of residents live in poverty, below the national 12.4%. Real estate commands a premium here — a median home value of $644,600, with typical rent around $1,866.
About 36.8% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. An unusually large 18.1% of workers are remote, above the national 14.0%, and the average commute runs about 31 minutes each way.
High housing values reframe the income picture in Snohomish County — even solid earnings stretch less against home prices and rents at this level.
Snohomish County Population History (2010-2024)
The county of Snohomish County had a population of 715,522 in 2010 and 864,113 in 2024, a 20.8% growth over 14 years. The peak was 864,113 in 2024. Average annual growth rate: 1.36%.
864,113
Population (2024)
715,522
Population (2010)
864,113
Peak (2024)
1.36%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 715,522 |
| 2011 | 722,149 |
| 2012 | 732,239 |
| 2013 | 744,322 |
| 2014 | 757,485 |
| 2015 | 770,022 |
| 2016 | 787,886 |
| 2017 | 803,061 |
| 2018 | 814,107 |
| 2019 | 822,413 |
| 2020 | 829,975 |
| 2021 | 836,235 |
| 2022 | 841,529 |
| 2023 | 850,297 |
| 2024 | 864,113 |
Race & Ethnicity
| White | 66.4% |
| Black or African American | 3.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.0% |
| Two or More Races | 0.1% |
Age & Sex
38.4
Median Age
49.6%
Female
50.4%
Male
14.4%
Age 65+
Age Distribution
Children (under 15): 18.6% · Seniors (65+): 14.4%
Income & Poverty
| Median household income | $107,982+$13,030 vs state |
| Mean household income | $136,089 |
| Per-capita income | $51,836 |
| Poverty rate | 5.2%-1.2% vs state |
| Unemployment rate | 2.9% |
| Employment-to-population | 63.9% |
Top Industries by Employment
The largest employment sector in Snohomish County is professional & business services, accounting for 20.0% of workers.
How residents commute
3.1%
Drive alone
1.7%
Carpool
66.6%
Public transit
18.1%
Work from home
31.2 min
Avg commute
Housing
$644,600+$124,800 vs state
Median home value
$1,866
Median rent
68.4%
Homeownership rate
327,893
Total housing units
95.1%
Occupied
4.9%
Vacant
31.6%
Renter-occupied
Social & access
93.9%
With health insurance
97.3%
With broadband internet
30.2%
Foreign-born
7.1%
Veterans (18+)
12.0%
With a disability
76.3%
Speak language other than English at home
Education
93.1%
High School+
36.8%
Bachelor's+
Largest cities in Washington
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County rankings
Common questions about Snohomish County, WA
Frequently Asked Questions
Snohomish County, Washington has a population of 834,648 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Washington. Population density is 400 people per square mile.
The population of Snohomish County has grown 20.8% since 2010 (715,522 → 864,113), a +1.36% annualized rate.
The median household income in Snohomish County, Washington is $107,982, with mean (average) household income of $136,089 and per-capita income of $51,836. 5.2% of residents live below the federal poverty level.
In Snohomish County, the largest racial and ethnic groups are White (66.4%), Black or African American (3.6%), Hispanic or Latino (3.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Snohomish County, Washington is 38.4 years. Residents are 49.6% female and 50.4% male.
The median home value in Snohomish County is $644,600 and median monthly rent is $1,866. 68.4% of occupied housing units are owner-occupied. The county has 327,893 total housing units, 4.9% of which are vacant.
The largest employment sector in Snohomish County, Washington is professional, scientific, and management services, employing 20.0% of workers. The unemployment rate is 2.9%.
Seattle is among the largest cities associated with Snohomish County, Washington, with a population of 741,440.
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Statewide data for Washington
Population, race, income, age, and trends across Washington
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.