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
Other counties in Washington
Part of Washington
Metro areas in Washington
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.
Snohomish County, WA Climate
Snohomish County, WA has an average annual temperature of 7.5°C (46°F) and receives about 2152 mm of precipitation per year. The warmest month is August and the coldest is December. Figures are 1970–2000 climate normals.
7.5°C
Avg Temp
2152
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 1° / 34° | 304 mm |
| February | 3° / 37° | 227 mm |
| March | 4° / 39° | 216 mm |
| April | 6° / 43° | 158 mm |
| May | 9° / 49° | 118 mm |
| June | 12° / 54° | 89 mm |
| July | 15° / 58° | 53 mm |
| August | 16° / 60° | 60 mm |
| September | 13° / 55° | 110 mm |
| October | 8° / 47° | 186 mm |
| November | 4° / 38° | 318 mm |
| December | 1° / 34° | 313 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Snohomish County, WA
The most comfortable months to visit Snohomish County, WA are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 22°C high). The coldest is December (near -2°C low). November is usually the wettest month.
Where to stay near Snohomish County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.