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zipcodes.pro — CITY/WA/OSO

Oso ZIP codes, Washington

No ZIP code is named for Oso, WA; addresses there use a neighbouring town's name. The ZIP code covering it is 98223. Its area codes are 360 and 564.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
245
Area codes
360, 564

NANPA lists no telephone rate centre for Oso itself, so these are the area codes of the nearest one, Mount Vernon (12.7 miles). A town on an area-code boundary can differ from its neighbour.

Oso in numbers

About 245 people live in Oso, in 63 households. The median household income is $140,486 a year, 43% above the Washington median of $98,141 (US: $80,734). The median owner-occupied home is valued at $741,100 (31% above the Washington median). The median age is 40.2; 9.7% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington).

Population245Oso245
Households63Oso63
Median age40.2Oso40.2Washington38.3US 38.9
Median household income$140,486Oso$140,486Washington$98,141US $80,734
Median home value$741,100Oso$741,100Washington$564,600US $332,700
Bachelor's degree or higher9.7%Oso9.7%Washington39.6%US 35.7%
Population density87 / sq miOso87 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Oso CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes covering Oso

These ZIP codes cover part of Oso but are addressed as somewhere else.

ZIP codes overlapping Oso
ZIP City Type Population Median income Median home
98223 Arlington , WA Standard 46,497 $99,681 $601,400

Map of Oso ZIP codes

98223

The ZIP codes of Oso, WA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Oso

The nearest larger towns are Lake Cavanaugh (304 people, 4.9 mi), Arlington Heights (2,727 people, 8.4 mi) and Swede Heaven (746 people, 9.5 mi).

Towns near Oso
TownPopulationDistance
Arlington Heights 2,727 8.4 mi
Bryant 2,648 12.3 mi
Canyon Creek 3,910 12.4 mi
Arlington 21,095 13.1 mi
Granite Falls 4,659 13.6 mi
Sisco Heights 3,015 14.6 mi
Lochsloy 3,029 16.5 mi
Lake Cassidy 3,292 16.9 mi
Marysville 73,002 17.8 mi
Lake Goodwin 5,536 19.5 mi
Stanwood 8,373 19.8 mi
Mount Vernon 35,377 20.4 mi
Lake Stevens 40,253 21.1 mi
Sedro-Woolley 12,831 21.4 mi

More nearby: every ZIP code in Snohomish County · Washington ZIP codes

Cite this page

zipcodes.pro. “Oso, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/oso

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