Postal reference / United States

98303Anderson Island, Washington

ZIP code 98303 is a United States postal code for Anderson Island, Washington. Its county association is Pierce County. The map reference point is at 47.1563, -122.7067.

State / territory: Washington
Recorded place name: Anderson Island
County association: Pierce
Estimated coordinate: 47.1563, -122.7067
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ZIP prefix: 983 · 81 ZIP codes share it
Data source: GeoNames postal reference, snapshot September 26, 2026

GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.

Area

Land area: 7.952 sq mi (2023 Census Gazetteer)

Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.

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Nearby ZIP code reference points

ZIP code	Place	State	County association	Miles
98351	Longbranch	WA	Pierce	3.8
98516	Olympia	WA	Thurston	4.6
98327	Dupont	WA	Pierce	5.4
98388	Steilacoom	WA	Pierce	5.6
98433	Tacoma	WA	Pierce	6.3
98467	University Place	WA	Pierce	7.2
98333	Fox Island	WA	Pierce	7.3
98498	Lakewood	WA	Pierce	7.4

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