County Maps US

Snohomish County, Washington

A county in Washington, ranked 3 of 39 by population.

CountyFIPS 53061

Within Washington
Snohomish County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Everett, the county seat, located via the 2025 Census Gazetteer.

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Population
870,656
+40,755 (+4.9%) since 2020
Land area
2,087
square miles. A further 5.0% of the total area is water
Population density
417
people per square mile, computed rather than published
County seat
Everett
Seat of county government.
Established
1861
164 years ago
Largest city
Everett city
Population 113,567.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Snohomish County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Snohomish County, Washington from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 459 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Snohomish County ranks

Position among the 39 counties of Washington, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn WashingtonNationally
Population870,6563rd of 3974th of 3,144
Land area2,087 sq mi13th of 39270th of 3,144
Population density417 per sq mi6th of 39337th of 3,144
Median household income$111,2462nd of 3990th of 3,143

Full data for Snohomish County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population870,656Vintage 2025 Population Estimates
Population in 2020829,901Vintage 2025 Population Estimates
2020 estimates base?827,947Vintage 2025 Population Estimates
Land area2,087 sq mi2025 Gazetteer Files
Water area109.2 sq mi2025 Gazetteer Files
Total area2,196 sq mi2025 Gazetteer Files
Population density?417 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$111,246American Community Survey 2020-2024 5-Year Estimates
Median home value$696,000American Community Survey 2020-2024 5-Year Estimates
Median age38.6American Community Survey 2020-2024 5-Year Estimates
Households316,212American Community Survey 2020-2024 5-Year Estimates
Housing units331,530American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+3,698
9,996 births, 6,298 deaths
Net migration
+5,800
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Snohomish County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Skagit CountyWashington67 mi132,975
King CountyWashington62 mi2,344,939
Chelan CountyWashington58 mi81,941
Island CountyWashington36 mi85,657
Kitsap CountyWashington3.6 mi283,374

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

Side by side

All 39 counties of Washington

Open the interactive Washington county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.