ZIP codes

ZIP codes in Thurston County, Washington

Thurston County has 15 ZIP codes. 13 lie entirely inside it and 2 are shared with neighboring counties, so part of their land and their people are elsewhere. About 299,793 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 15; 1 more just touches the border (under 1% of their land)
Entirely inside: 13; 99% or more of their land
Shared with other counties: 2; Most with Lewis County (2)
Most populated ZIP: 98501; 48,067 people · Tumwater
Least populated ZIP: 98556; 350 people
Largest ZIP by land: 98512; 139 sq mi · Tumwater

Map of the ZIP codes in Thurston County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Thurston County

15 ZIP codes in Thurston County, WA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
98501	Tumwater	48,067	100%	48,067
98502	Olympia	35,398	99.4%	≈ 35,376
98503	Lacey	41,656	100%	41,656
98505	—	881	100%	881
98506	Olympia	18,497	100%	18,497
98512	Tumwater	31,864	100%	31,864
98513	Nisqually Indian Community	38,017	100%	38,017
98516	Lacey	29,177	100%	29,177
98530	Bucoda	619	100%	619
98531	Centralia	27,337	21%	≈ 3,563
98556	—	350	100%	350
98576	Rainier	4,985	100%	4,985
98579	Rochester	14,048	59%	≈ 13,051
98589	Tenino	7,010	100%	7,010
98597	Yelm	26,669	100%	26,669

They also touch the county with under 1% of their land, so they aren’t counted: 98568.

ZIP codes shared with other counties

These 2 ZIP codes have part of their land in another county. The first figure is the share of their land in Thurston County; then, where the rest lies.

98531 (Centralia): 21% here; 79% in Lewis County.
98579 (Rochester): 59% here; 41% in Lewis County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Lacey (2), Olympia (2), Tumwater (2), Bucoda (1), Centralia (1), and Nisqually Indian Community (1); 10 places in all.

All 15 start with the same three digits, 985: the prefix of the USPS sorting center that handles them.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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